I didn't see you mention it, but many have also widened the metal rail/track the leading edge of the glass runs in, to reduce friction/ pressure on the glass. I used pliers and opened up the C-shape metal track until it was wider at the edges, particularly near the top as that's where I could see it was binding.
I also had the SBC brackets installed even though my plastic clips weren't broken. I use pure silicon spray to lubricate the rubber channels.
Here's a fix using a bungee cord (Joshi & SlowPro48 have successfully done this):
http://www.vehicross.info/forums/sho...63&postcount=9
I recall there was one owner (Bulldoggie, and then tysamigo) that neither of the above helped. He tried putting some metal washers in a stack, maybe 1/2" or so, to act as spacers and push the bottom of the glass outward, and of course that made the upper part of the glass tilt inward more. I believe that solved the tilting and jumping the track issue. I recall he just kept adding washers (thickness) until the angle was optimized.
http://www.vehicross.info/forums/sho...8&postcount=38
And just cuz I have them all together, I'll include them here. Maybe there's a thread or two you haven't seen that might help. Hope one of these works out for you.
http://www.vehicross.info/forums/sho...window+binding
http://www.vehicross.info/forums/sho...ow+binding+fix
http://www.vehicross.info/forums/sho...n+track+window
http://www.vehicross.info/forums/sho...window+binding
http://www.vehicross.info/forums/sho...58&postcount=4
http://www.vehicross.info/forums/sho...ow+binding+fix
http://www.vehicross.info/forums/sho...threadid=10278
http://www.vehicross.info/forums/sho...7&postcount=26
http://www.vehicross.info/forums/sho...0&postcount=27
http://www.vehicross.info/forums/sho...7&postcount=31
http://www.vehicross.info/forums/sho...8&postcount=38
http://www.vehicross.info/forums/sho...+binding+track
http://www.vehicross.info/forums/sho...t=window+track
http://www.antiquecaterpillar.org/vx...cal/Window.asp
http://www.antiquecaterpillar.org/vx...indow_Bert.asp