So, I think I figured it out; this pattern in the sheepsfoot blade hits a real sweet spot for me between the 15 frame's blade (a touch too short):
and the old (enormous) Northwoods English Jack (all apologies to Derrick for swiping the picture; I don't own one, and only want to use this pic to make my point):
The 77 seems to just sit perfectly in the Goldilocks zone of sheepsfoot blade length, at least for me. AHHHHHH. . . fantastic! Just right!
Anywhoo,
Thanks!
Brian
P.S. Don't think it was accidental to show how great a sheepsfoot blade looks with a caplifter, as its faithful, and ever prepared, sidekick. . .