Re:
Hi well mine look ok and index ok but slip under load it took me ages to find some (not from total sharks who want the shirt off your back) id had 2 pairs previously which were broken so I think they are prone. There are other 6 speed sis shifters that will work or friction and id go for them. Ive got a set of friction 600 and i might have a pair of shimano 6 speed sis that i could try and find out. Id say £23 posted for each. I love 600ex it looks great.