For future reference does anyone know of a set-up or rebuild guide, preferably illustrated, so that I can see how it all works in there?
Not really, but there isn't that much to know, now you've worked out how they go together - the important bits aren't supposed to be servicable. The only subtle thing is that the left and right shifters' tabbed washers are subtly different, and if you get them the wrong way round they'll /almost/ sit right.
Also - how tight do you have the boss screws? Is it always the case that the right shifter has fairly firm detentes or can I reduce this? Slightly concerned about them dismantling themselves during a ride.
Boss screws moderately tight, so there's no question of anything working loose. Never has done. Not had any problems.
The firmness isn't adjustable, AFAIK, unlike on the Microshift
[1] version.
The thing to worry about isn't that they'll dismantle themselves during a ride, but that they'll get bashed and broken. Obviously this is more of a risk on a USS recumbent, where they're in an exposed position and all you have to do it load it onto a train wrongly, than on normal drop bars, which will tend to pivot out of trouble. The right shifter is particularly vulnerable to sideways force, as the indexing ring is fragile (?plastic) and will crack. Once this happens, you may or may not notice partially incorrect indexing, depending on where it cracked. Eventually the innards work apart and the friction bit loses grip, and then you're stuffed. The left is simpler and will take more abuse, but has the same eventual failure mode. If the outer black plastic ring is cracked, then it's just a matter of time before the shifter fails.
If you find the rubber grip works loose, this can be easily rectified with vinyl adhesive.
[1] I've just fitted a set of these. They work well enough, but it's too early to tell whether they're more durable than the Shimano.
