CRT.5 build - would opinions on my setup choices

[VintageMA]

The buggy should hopefully arrive tomorrow for the weekend.

I guess I am still missing the UBEC - can you send a link to one?

Any idea what you are going to use for the diff fluid? I've been reading 3K f/3K c/ 1K r is a popular starting point - but I am wondering if it would be better to go go with the standard 3/7/1 used for buggies - I'm never sure where to start with that as I mostly just bash and don't race.