Another shot of the oiling system:

I've honestly been avoiding starting it because I didn't want to know if it didn't work. But...

That's a "clean" garage floor (clean is a relative term). Well, it's a garage floor without any oil on it, anyway. This only ran for 30-40 seconds, but that's much longer than I could go before without dripping. BONE DRY everywhere in the system. Hopefully it stays that way.
For reference, here's the setup:
Turbos have little "collectors" I CNC'd under them. These have a very slight drop of AN10 drains to a collector tank, which is about 1/2 quart of volume. This has an AN6 vent that runs up to the top of engine bay (I'd like to tie it to the oil fill cap, or my crankcase vent system eventually, but for now it has a little vent on it). There is also an AN10 line that runs to the scavenge pump (Turbowerx). This then has an AN10 back to the GT500 oil pan "level check" port, which is under the full oil level. To prevent drain back, there's a low pressure check valve from Radium on the scavenge pump outlet.
The feed side ties off the remote oil pump housing adapter with an AN4, which runs through a small filter, and then to a Turbosmart turbo oil pressure regulator to drop pressure to 40 psi feeding the turbos.
Here's hoping this continues to work well. There is ZERO reason it shouldn't, but we shall see. I -might- still need to add a check valve on the feed side, but it shouldn't be able to drain past the regulator, meaning it's just a small volume of AN4 lines that could drain, and as long as the sump tank below the turbos isn't full, it should be fine.
Also, all the cam solenoid issue is validated as fixed. Cams are on VCT as they should be, and all 8 cylinders are running fine.
Next up is charge pipes, and a support bracket for the oil sump tank, then bolt check, alignment, and test drive.