I haven’t done anything with SNIP, so not much help there… I’m curious though, is there some reason you didn’t use RTKBase? It’s what I use, and very reliable, and easy to set up. Can send to 2 casters, and run its own caster.
RTK2Go has had quite a few random downtimes this summer. If you end up using a commercial caster, I’d recommend using emlid, or something. I’ve had good luck with emlid, so far.