when I tested tibial tuberosity, Plumb bob was about 1-2 cm off
spindle, not bad for a wild guess at position.
Leg extension seems neither excessive, nor too little (have slight
bend at knee when at 6:00 position, in a heel down
position I can straighten my leg completely).
What I did notice when I climbed back on (took 2 days off to allow
hams to stop hurting) was that new position is causing me
to spin more, with more power thru bottom of stroke. So I'm
thinking this was a simple working the muscles more,
and need to stretch more (which I did last night!)
No ham pain fyi.

thanks for the advice,
Marty