Hi Dougr, Your finish is looking really nice. I've got a tru oil and stain on mine.

I am just in the very final stages of my GR 1Sf build.

I had a lot of frustration from the wiring too. And like you got wires soldered wrong! Also ordered new pots. But in hindsight I probably didn't need them.
I did get a roller bridge though, as Adam suggested it would be good with the tremolo.


In the end I ordered the vintage braided wire and did most of the job with that, plus a little of the cloth covered wire.
I found that both these wires were much stronger than the kit wire, and once soldered wouldn't break after moving the loom around.

I covered the braided wire with heat shrink too. And the braid was then grounded to the pot or used as a ground, which made for a cleaner wiring loom.
I would say go slow, and check it all as you go. I had to go back several times as I was getting the buzz too and I tried different wires.
What also helped was plugging my other guitar into the same Amp with volume up to 10 to compare the noise to the new guitar and get a reference or benchmark.