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Undo the locking screw on the outside, remove the fork piece on the inside and the complete mechanism comes out from the inside
Tight is the one, there is a generic for 6mm bolts but thats in the book and mine aint here
I’d go for 3-5 ftlb in the absence of other info…..just saying.
Modern manuals say 6.5ftlbs for a 6mm screw and 7ftlbs for a flanged 6mm bolt.