Toe hang – Understanding that “faced balanced” and “toe heavy” are just two sides of the same coin, and that neither favors/promotes/helps a SBST or arc stroke, my face angle at impact was the same (with very little exception) regardless of putter or toe hang.
Can you elaborate a bit on why a face-balanced putter and one with toe-hang are "just two sides of the same coin"?
"Toe Hang" has kind of morphed into being synonymous with a rotational face bias lending itself to an arcing shaped stroke. The rub here is that the toe does open and close, but in the exact opposite way of the popular "toe flow" idea. The heavier toe creates "toe tow". Without manipulations and compensations, the extra mass in the toe area causes it to lag closed on the backswing and lag open on the forward swing. Both face balanced and toe hanging putters do this, one is just a little more pronounced.
SBST and arcing proponents teach having the face square to the path. If that's the goal, then why would a design that works against this be considered a benefit to either shape? As a practical matter, we are just dealing with grams not pounds. So overcoming these design hurdles is easily enough done with a little extra grip pressure.
With the extra mass in the toe area, the toe will be the last to move (lag behind) on the backstroke - the lighter heel goes first. As the putter reaches the end of the backstroke, the heel slows down and stops, but the heavier toe continues on past the heel opening the face to the path. From the top, the lighter heel is again the first to move/fall on the downstroke. The heavier toe lags behind causing the face to open even more. The toe continues to lag behind the heel (well past low point) until the heel slows down and eventually stops at the top of the through swing. The toe then passes the heel to close the face to the path. The heavy toe does close the face, but only after the lighter heel stops moving. Keeping in mind this is just how the design "causes" the putter to move without any interference from the puttee.
A good analogy would be weighting a driver. All things being equal, adding more weight to the toe slows down the toe or cause it to lag behind. Taking weight out of the toe (adding to the heel) increases the rotation or lags the heel. I'm bad enough to still be able to hook a toe weighted driver, but what I'm essentially doing is towing the toe. If I just let the toe flow without any help, I'd be out in right field.
So what about the putter's CofG? Let's build a putter using a chunk of aluminum that is 3/4"x2"x4" .. which is a mallet-sized putter head. The CoG of this aluminum block is located in it's geometric center ... and it weighs about 11 oz. or ~ 325 grams.
If you install a steel shaft just behind the 3/4" putter face and ahead of the head's CofG centerline (to make it face-balanced), the combined CofG will migrate closer to the shaft because the mass of the shaft draws the CofG away from the putter head CofG. Think about it as the combined CofG.
If you hang this basic putter from the butt end of the grip, it will hang on it's principal vertical gravitational axis and intersect with the putter head just behind the shaft. What this illustrates is that the CofG of the putter is greatly affected by the weight of the shaft. In a heel-shafted putter, the principal vertical axis moves closer to the shaft, and the sweet spot is along that axis line.
The Center of Gravity is properly called the Center of Mass in scientific terminology. The Center of Percussion of a putter is not located on the striking face, but is somewhere above the head and located on the principal vertical axis. The "sweet spot" located on the putter is just a point on the principal vertical axis coincident with the putter face that balances the masses equal in each direction, so that when the ball is struck, the head will not twist and impact will feel neutral.
What this all means is that for any putter head design, the principal vertical (hanging) axis is very close to the putter face regardless of what designs are used behind the putter face ... all because of the significant mass of the shaft and grip.
All that silliness attached to the back of the putter is quite irrelevant, because the CofG is all that counts for the impact event. Furthermore, all that sculpturing has no effect on how the putter head swings because pendulum motion is only dependent on the location of the principal vertical axis of the complete putter and not the putter head only.
Once a shaft is installed into a putter head, it is very difficult to significantly alter the location of the combined CofG and principal vertical axis, because of the overwhelming mass of the shaft and grip.
Interestingly, the CofG location of a driver head is independent of the shaft going through release and impact, because the flexing of the shaft tip "disconnects" the driver head .. and therefore the CoG of the driver head is significant. Not so with a putter which is a one-piece assembly.
From my own experience with the guys who like an arcing path, I'd say 90% + say they use a toe heavy putter because they believe it promotes the "toe flow" effect they think helps their stroke. It's just one of those myths that's been around for so long.
I think what you said about the feel of the toe is more accurate, at least on a subconscious level. Good astute putters probably feel "a movement". I also think part of it is, blade and Anser style putters just look better to a wider audience, and the simpler designs are usually easier to aim.
I believe you're dead on about the driver weighting deal at the post production stage. Owning both "tour" heads and retail heads, biases can definitely be engineered to favor a flight, but strapping some tape on the heel/toe is a different story like you mentioned. I don't recall the exact number of grams required to start effecting the weight bias, but it would be quite a gob of tape.
Are you still rolling your Gauge/Whitlam?
Nitwit is a big fan of lead tape on his drivers. He had a Krank driver that was so much fade biased he loaded it up towards the heel, believe it or not.
The first Gauge by David Whitlam I had worked great (black with a yellow site dot), but I retired it for an authentic Gauge Japan version that is more or less identical spec wise, but silver with a white site dot (I think; the dot may be red...). Both are pretty much copies of a 36" Ping Anser I took out to the practice green in 1980 and kept in my bag until I got the Whitlam a few years ago.
This is part of a great post from Geoff Mangum's fourm by a smart dude named "sammy":
Great stuff, thought some of you might enjoy it.
Anyone have any experience with his putters?
You ever seen that driver? Gave him a hard time for buying that thing. I can definitely believe he loaded it up with tape. He's old school - and a hoot.
The Japanese models are sweeeet.
He tried to talk me into buying one, although he may have been kidding. It had two shallow trenches that ran across the crown from front to back, about wide enough to fit a strip of lead tape. He loaded up the trench closer to the hosel and said he loved it.
As for the Japan Gauges, at the end of the day they are just putters. I've gotten over my phase of buying exotic clubs.