All this looks really interesting!!
I have a few questions as I'm not sure about a couple of things

BTW I have the Trevor Cartel 1675 watch.
(1) I can get a 1675 Bezel set & a Pepsi Insert all from Clark, that will fit on this watch?
(2) I noticed from the links, that the bezel set is designed for a Plexi/plastic 'crystal', so I will need to get one of these from Clarks aswell??
(3) Does clark supply a replacement dial and is one recommended??
(4) I'm really puzzled by the GMT modification. Basically, you can remove the GMT pinion/gear (& other gears I assume) and fit them to an ETA2846 (This is the low beat version of the 2836-2 currently fitted). You could swap all the gears over BUT I don't understand this thing about fixing the GMT to the hour hand??
Does this mean you are no longer able to independantly set the GMT hand? For example living in the UK, I might set the GMT to GMT, but in the summer we go an hour ahead. I can see how you could fix this to be the case when re-fitting the hands and removing the GMT setting gear. BUT if the GMT hand slipped etc then you would not be able to fix it??
One more question on the GMT movement. Are all the pinions the same length? I know that the GMT second hands have a longer tube. But are the minute and hour pinions the same length or do these need to be swapped over too??
Either way I would be gratefui for any guidance !!
P.S Any cheap sources of the 2846 movement??