With a far too long hiatus, I spent some time over christmas 2023 doing the gear linkage. It’s just mocked up for now (hence jubilee clips and over-length rods), but works really well and all gears fit in the perfectly.

The gearbox end – the “lever” that makes it all happen. Will be shortened eventually:

Detail of the shifter bar. I reused as much as I could of the old UN1 linkage mechanism – although the audi box shifts the other way round entirely:

But it seems to work. I cut the old gate around a bit just to see if it would all work, will probably get a nice laser cut one eventually: