Balancing holes & Parts sources
The balancing holes are definitely there on all RDX's and Phi's. I currently have two Phi's and use the holes for my initial setups for side-to-side balancing when positioning components. No problem.
Also agree that I can quickly get everything needed from either Corally USA or Superior Hobbies. They are in the same building...LOL. Jeff and Rob know everything; so, I get great mentoring from them.
Edit: Looks like the Corally drivers answered everything above. I am not sponsored. Just love their touring cars for carpet and asphalt.