[mr0077]

Okay, so the Precision stand is "only" held down by the rocker stand bolt (or stud), with no outboard bolt? The photos on Ebay seem to show that also. With this arrangement, for the outer end of the rocker shaft to flex, the lower (base) part of the stand would also need to "lift" or flex.
FWIW, the force trying to bend the shaft is "only" 950 lbs or so {appr. 350 lbs from the open spring plus 616 lbs pushing up through the pushrod [350 lbs open spring pressure x 1.76 (rocker ratio)]}, I guess the extra support is plenty for street use...that works out to only about 100 ft-lbs of torque trying to bend the shaft...