Thanks, I doubt there’s a market for making parallel rebel boards or someone would have done it.
KD has premade parallel boards with Nichias and a variety of different XPL-HIs as well, but not for Rebels
I’m going to try the twisted-teflon-wire method shown in A Day of Fails and Other Fun with Osram Oslon SSL 4000K 92CRI Emitters. Day Two: Fail becomes a Win. New emitters and a new tint for wiring