So. Seeing as the rules helped R4 work with Cova, I've been using R4 on Cova (totes awesome).

I've also been using Leia to make Cova's turns blue, but a recent inquiry during a tournament has me wondering if this is correct.

Can I use R4 and Leia to lower the difficulty of a move from red to white to blue?

Yes. R4 and Leia stack.

Just to show the part in the rules where this is stated, in case you have to reference it.

It comes down to the last paragraph:

Thanks all. Just had a bit of a brain fart finding the exact quote even though I was pretty sure I wasnt cheating