Hi from Auckland, JohnP90. Having finally made it so far in your thread (it's winter here!) all I can say is, carry on! It will be so worth any and all the hassle.
This baby was made for me and incorporates the things I loved most about Les Pauls, ES295s, Gretsches and Neil Young!
It could be a time-capsule for you - it's now 18 years old and the bloom as each note grows is amazing. Notes honestly seem to get louder before they die away. I'll try and walk the line between hijacking your thread and satisfying your curiosity.
So, the nitty gritty (from memory): the body was a single piece of mahogany, split, bookmatched, glued then routed, leaving the centre slightly higher for the single piece maple top. Ebony fingerboard on a laminated mahogany neck, profiled after my '89 LP Junior.
The finish mirrors my personality: showman upfront but with serious retro sensibilities, so an antique 'burst round the back. Celluloid binding.
Hand-wound, alnico-slug P90s, the rotary controls are (from the bottom): 6-way vari-tone selector, master tone and master volume. Standard p/u switch with p/u blend control on the horn. Pulls up for out-of-phase. Hand-turned knobs with cut-garnet inlays.
The fingerboard inlays were inspired by something I saw in a 1920s catalogue. Ibanez tremolo, Schaller roller bridge, bone nut, Grover Imperials but these really were too big on the slimmer Gretsch-y headstock. I have since replaced the buttons for something smaller. The 'S' is for Bob Scott, the luthier.
The scratchplate, trussrod cover and tremolo insert are all white leather, the cheap plastic 'gemstone' guitar sticker on the trem was my final act of customization.
The best thing about a guitar like this is that no-one else has to like it

My only regret is that in those days, we didn't think to photograph everything along the way so your energy in putting this thread together for posterity is even more praiseworthy.
So, thanks, and (like everyone else) I can't wait to see the finished guitar.
Best, DD.