After some research (Internet only) it seems that I can run 10 speed duraace shifters as long as you avoid (985) derailleurs. Supposed to work ok with a 9 speed 970 rear d. May need to change my fr der as this is dynasys (985)..
Wanted to run latest gen xtr, but also wanted to run thumbshifters.... Hmmm decisions!
So what you are saying is that you can run 10sp with the DA thumbies, 9sp rear mech and 10sp cassette? I hope this is true as it opens up a lot of options
Your front mech should be ok. The left thumbie works in friction mode only so no indexing issues to worry about. Its only the rear mechs that have different cable pull ratios.
Fudd sir, having run both 985 and then a thumbie set up - which wins over for you thus far???
That's hard to say - The M970/980 are buttery smooth and allow 3 downshifts or 2 up in one press and they are almost always in the perfect position. The thumbies on the other hand can shift as many gears as you like in one move but you have to change your grip a bit to do it but then that becomes intuitive after a while.... I'm not sure which I prefer but I have three bikes and two of them have thumbies fitted....