XLR
We don't need the extra shielding of XLR for our short runs in Home Systems, however some/most XLR connectors LOCK in place
and some, not all XLR outputs have a stronger signal (+3db) than RCA.
RCA
1. Audio Classics changed my vintage jacks to all new Gold Plated RCA jacks
2. I bought or changed all my RCA connectors to LOCKING type, so when I mess with any cable I do not even slightly disturb any other cable's connection.
IF ordering a custom length, you might ask the maker if they have a locking connector option.
I bought something like these and changed some of mine
https://www.parts-express.com/Locking-RCA-Plug-Solder-Type-2-Pair-091-1270?quantity=1
these come various lengths
And, I found a 3 wire video composite cable with locking connectors, bought two, pulled them apart, and ended up with 3 pairs, color coded locking connectors.

