pass side window hard to roll on '66

[luvbowties]

Both doors received same treatment. Both worn, but rolled equally well before new front channels on deflectors, main rubber all-arounds, fuzzies, etc. Glasses NOT reset. Just tried new regulator with MAYBE negligible improvement. Harder on last of top half of trip going up--worse going up than down. Also refuses to go up final 1/4 inch.

Please, any ideas?--esp. from those who have actually experienced the same problem AND welcome others too.
Sam