I'll start out by saying I've fitted, and indexed probably over 50 cassettes, so... I *shouldn't* be a moron.
I've got my 42t OneUpComponents cassette ring, a new Shimano 11-36 cassette, and a new SRAM 10sp chain.
It's a PITA.
I can't get it set up without when shifting into the 42t ring that shifting back down will actually move the chain off the ring. It's as if there's not enough spring tension in the mech to pull it off the ring.
I've tried the with a different chain, and now just re-indexed without the ring installed (plus the spacers). And it's shifting fine, so cassette+chain = OK.
I'm thinking its down to the B-screw needing to be out so far that the chain loses tension, and can't drop down a gear.
Anyone installed theirs OK?
I've got a SRAM X9 Type 2 rear mech, Works Component thick thin 32t, and Shimano XT 11-36, removed 17t and spacer, then put two spacers at the back of the cassette - as mine is a MY13.
Cheers, I'm going insane.