Good stuff, Bean. You're definitely on the right track. Should be a fun project!
Mini-XLR connectors are a reasonable choice and from what's available at Mouser, the Amphenol connectors would be the best choice. They are pretty-much identical to genuine Switchcraft connectors and much cheaper. I would avoid the Rean connectors for a multitude of reasons, none of which are important enough to go into detail about here.
Not to slow you down, but I might also recommend a some alternate connector choices simply because the Mini-XLR format is so heavily used. Choosing an alternate connector entirely avoids the possibility of a mix-up and might actually be easier to work with. I hadn't looked into the particular connectors that were out there when I made my previous post, but an hour or so of research turned up some possible alternatives:
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Switchcraft EN2/EN3 Series -
MOUSER LINKYou''ll know these as the "N-box" connectors and they would make pretty good power connectors. They come in a two-pin format which is nice and are a lot easier to work with vs. Mini-XLR, simply because they're bigger. The solder cups on these are HUGE compared to Mini-XLR and the cable boot accepts a better range of wire gauges. Best of all, these are IP68 rated when mated (totally dust tight and protected against prolonged water immersion). In comparison, Mini-XLRs are not suitable for wet conditions at all. The moment they get wet, you are going to have a power short and that is very, very bad.

These are about $3.50 - $4.50 each, so pretty affordable. For cable-to-cable connections, you would need one EN3"C" and one EN3"L" connector and both come in Male/Female, so it's designer's choice as to which is which.
Conxall / Switchcraft Micro-Con-X Series -
MOUSER LINKI haven't personally used these, but they look pretty good on paper. IP67 rated (dust tight and water resistant), which is miles above a Mini-XLR connector and it looks like these are maybe a little bit smaller than the EN2 and EN3 series, but otherwise about the same. Haven't looked closely enough at the part numbers, but these are definitely available with the right cable-to-cable mating options.
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I'm sure there are other good options, but those two seem very solid to me vs. mini-xlr and I really like that they are more or less weather proof. The one thing I didn't find was a plain-ol' locking barrel solution, similar to adaptaplugs or the switchcraft 760K, but those aren't necessarily going to be any better than Mini-XLR anyways.