I have searched this topic and came away with unanswered question. Must a cassette shim be on the inside of the stack? All the posts relating to "pinching" the cassette with the shim technique call for the shim to be put on first then put the cassette on normally. I have found that on a recent build- DA 9 with a Mavic 10 hub, DA 12-25 cassette- that the alignment seems better if I put the shim on the outside of the cassette near the lock. I can hit 39-13 without 53 rub up front. I do not use this ratio much but again the center to top cogs line up better as well. Cannot do this with shim on inside. Thoughts?