I want someone who is familiar with the Alfine 11 hub as it needs tweaking – it’s skipping every now and then…
Also the chain has stretched but I can’t see how to tighten it, the bottom bracket is already in the max stretch position…
There’s no internal “tweaking” that can be done with Alfine hubs (not that I can see anyway). If the cable adjustment is correct and the cable isn’t sticking then they either work or they don’t. There are some reported instances of the 11 speed needing to be set up with the alignment marks slightly out of line to get better shifting but as I don’t own an 11 speed version I can’t speak from experience.
As far as chain adjustment goes – take out two pitches (one complete link) and fit a Gusset slink link and a half. That’ll give you some adjustment back. Depending on the EBB you might be able to just lose a whole link ( 1″) if you have over half an inch of adjustment in total on the EBB.