[DonVoigt]

for me getting parts will be the PITA I have to order and that takes a while, at least with my Garands/carbines I can grab a known working rifle off my rack and swap parts till it works and I have a ton of NOS parts for those

I think you have answered your own question. Ordering a single luger part, especially the side plate, sear bar, trigger lever, or striker (all of which work together to kock), does not mean they will fit your pistol or work together correctly.

I've built half a dozen shooters or so in the last 6 months, one or two fell together with minimal effort, a couple took two hours or more to make them work, one took 6 hours and drove me nuts.

And I had a good supply of parts to pick and choose and swap!

Luger tolerances and function are not as "cut and dried" as a garand and the carbine is so simple most anyone can assemble one. The parts are/were made to be truly interchangeable. Lugers were hand fit and the pieces numbered for a reason.

If you want to learn and cost is no object - go for it.