Yes, I should think so too. I've never given this much thought.I think once hte strings are stretched and settled you'd be fine intonating new (to new-ish) strings.
Once strings are stretched and tuning stabilizes it’s usually fine.Over the years,I've read several times, don't try to intonate your guitar with new strings. Can't recall ever anybody saying when your strings are old enough. A day? A week? A year?
Truss rod adjustment on the side of the heel?Also, I'll wait to see when somebody spots something. No, it's not the missing pickguard screw.
Don't overthink it...if you can tune the guitar to pitch and have the 12th fret notes match an octave higher you can intonate it...I want to know for sure I can intonate it/not have to move bridge
No or, at least not what I was thinking of. By the way, the main truss rod adjustment is on the bottom of the neck, like an old Fender. The one on the side, where you don't have to take the neck off is for fine tuning.Truss rod adjustment on the side of the heel?
In a bizarre coincidence, the Peavey neck had a micro tilt.You can do shims at the bottom of the neck pocket. Fender (US and Japan at least), G&L, Ibanez, and others used to put shims in to deal with neck angles. They are usually a 1/16th of an inch or less high, an inch to an inch and a half wide, and about 1/4" or so deep. They'd go nearest the neck pickup. There might be more than one or they might be a tad thicker...depends on the need.
Fender and G&L did away with the need as they used Leo's Micro-Tilt Adjustment (G&L's name). A variant was initially used on 3-bolt CBS Fenders and then adapted to the 4-bolt necks after Smith & Co bought Fender from CBS.
Your large shim works, but might not be necessary. A slight angle easily do as much as a larger slab shim. Also, the bridge screws can be filed/cut down as needed...which I know you know, but it is a pain in the ass.