sunrace shifters with shimano freewheel
I've got an old bike with a shimano SIS derailer and 6 speed SIS freewheel. I wanted to migrate from down tube to bar end shifters, using the adapters from rivendell, but the shimano down tube shifters dont work, so I picked up a pair of sunrace 6 speed indexed downtube shifters. Now I've been reading a bit online about these and it seems like the indexing should match up, but in practice, it's not so well. seems like if I adjust it so it's not jumping out of the low gears its not shifting right on the high gears.
has anybody worked with these? are they compatible, or am i just banging my head against a wall trying to adjust them right? alternately, does anyone know where to find shimano compatible 6-speed indexed bar end shifters?