Much appreciated, everyone!

I'm not super happy with the overall outcome of this build, but some individual parts I really like, and the overall process has been fairly enlightening. Can't wait to get a crack at v.2!
Alright, let's get this last update rolling. These aren't really organised in any way. Also, as it happens, I got some time today for assembly, so there are some initial completion shots too! Yay!
Rigging a center square from a pair of combination squares to mark the bottom front knob. Trickier part to make than it looks; a lot of setting up the compound, because the angles are all just weird.
In future I need to remember to center drill the back half of the stock I turn it from and not simply turn it from the end of a bar through the lathe head. There's no way of turning it around to grip and center drill once it has the rings in it, and of course no way to realistically hold it (short of some weird double-taper collet system thingy) once you've parted it off, so this'll be another part where a little waste will be a necessity for proper accuracy. As it was, I jiggered this thing up to mark the center and drill press it, and of course it's slightly off-center and slightly non-concentric, but fortunately it happened to work out on this build.
Layout on the front and rear plates was fairly straightforward, after some measurement shenanigans. I love the look of Dykem layout!
Front. Slightly unconvinced about that lower center screw's location, but that's an issue to be corrected for v.2.
The solution for side plate spacers. In retrospect, should've layered strips and cut off pads from that, rather than the other way around, but never mind. Just a couple wasted hours.
Pads going on the plates.
Spacer'd.
Ready for assembly!
Nomnomnomnom
The screwing in from both sides on a 4-layer frame is obviously somewhat of a problem. Up top it's ok because the trigger screws are singular, and the safety mechanism is a core, but near the bottom of the grip, there's nothing holding it together. So I used an OpenBuilds screw and an M5 locknut to make these ultra-low profile 60 degree taper fasteners that'll lock the grip end of the frame together, hidden under the grips themselves (in that big center hole you see in earlier pics, just chamfered with a center drill).
Boom:
Just quickly taken at my desk here after assembly. I'll be disassembling it again for an intro/demo/assembly video anyway, and of course beauty shots will ensue, so there'll be higher quality images to come.
But for now, that's the lot!