I'm having trouble with shifting on a triple crank with ergo shifters. The shifter is not indexed to the crank but it moves only in small increments, and in some gears I can't prevent the chain from rubbing on the derailleur cage, even after fine adjustments on the cable tension. It happens mostly when I'm pedalling out of the saddle and the frame flexes a bit.
I think having seen somewhere that you can put the shifter in pure friction. It might not be a good idea to do it (I can live with the rubbing), but has anybody done it?
Here's a diagram... (mine is a pre-97 Sachs lever actually). Remove the G-springs (#4)?