I have read that Brian Manzella believes the right leg should straighten a little. I have a chronic bad back and my hamstrings are very tight.Would it be best to barely flex the legs, so when my right leg does straighten,that it is changing position just alittle. I believe I now have quite a bit flex in my legs at address, so at the top when my leg straightens and am drastically changing the angle of the right leg.Would having almost no knee flex at adress be that bad of a thing?