Wheelbuilding / Wheel Building / Wheel build help

fabric looks like it features a repeating coffee bean pattern

Had not noticed before. It's a "kid proof" Ikea rug.

Well I thought you may have been inviting a countering opinion

I was indeed asking before Christmas, when contemplating buying some cheaper / no brand truing stands on eBay, but no answers or feedback at the time so I fell into the abyssal internet quest of comparing things, watching videos, etc., which conveniently lead me to over-equipping myself (thru a decent eBay second hand deal and a really nice seller actually)

Have you tried changing the ERD in your calculation to see what constitutes a material difference?

Yes I have now, and ordered a Sputnik rim from SJS. Spokes I'd already procured are bang on on the NDS, and only 1mm too long on DS (604mm ERD vs 602mm ERD). Should be fine. The spare rim that turned out to be 32h instead of 36 was the only old bit of the wheel, had it in the garage for years, it's been laced before. Now everything 's new, probably for the best.

You don't mention the hub

It's the controversial Sturmey Archer fixed 3 speed hub, which I've been wanting to try for a while in order to ride fixed again, which I've not been able to do in over 5 years, due to moving house and having to climb crystal palace on my commute!