Regarding optic cuts, if you want someone local to CA, Blackbeard Frameworks in Santa Rosa cut mine for the CZ Custom plate system, which is interchangeable between DPP/RMR (you'd need to buy the extra plate though). Moreauworks down in San Diego can also do a native DPP cut and is good/cheap.
The only concern I have with a direct cut for a DPP footprint is that Vortex dots seem to have a pretty bad track record of failing, but they're backed by a no-questions-asked warranty. However, if you get a replacement, it's not guaranteed that the exact tolerances will be the same. So if you have a rock solid version, it's no problem, but if you need a replacement, you might need the cut adjusted / it won't be as snug.