[documentation] selector assembly steps

[shiftingtech]

There are a few abnormalities around the assembly of the selector mechanism: nothing difficult to figure out, but they stand out after the earlier part of the manual

Page 106: calls for 2x M3x12mm SHCS and 1x M5x30mm BHCS which are in the exploded view, but aren't actually shown getting used until later

I think the M3x12 could be shown going in on page 108. They currently don't go in until page 111, which also works, but if they aren't going in until there, I'd suggest not listing them on page 106

the M5x30 doesn't actually seem to be required in this part of the manual at all. It's called out again on page 116, which seems fine to me. (I think, similarly, the other one is also called out twice: page 74, and page 116)

Why am I noticing such nitpicky things, you ask? Well, my assembly process was, each time I hit an exploded view, I'd locate all the parts it lists, and lay them out on my table. Then I'd follow the assembly steps until my table was empty again. If I had parts left over, I knew I'd missed something. This worked very well, right up until page 108, then it got a little weird.

[Miriax]

I've added footnotes to the manual that call out how the parts are shown for completeness and not used until Final Assembly. Most of the images are going to need to be redone for the gearbox redesign which is some months out, so we will fully rearrange these pieces then.