I know this doesn’t help you much but I’d just hit up Kifaru and or ask Aron sometime on Instagram. Just be prepared to possibly receive shit for the kuiu part
I think I use the shorter strap. I run it wrapped around the 2" nylon accessory webbing strap vs wrapping around the whole waist belt. I've been using the Gun Bearer set up like this with my Icon Pro, now Pro, system for several years and have been happy with it. If I recall correctly, I think I ordered both and tried the long wrapped around the whole belt and preferred my current setup with the short strap.