I just ordered a couple of the Iron Track BL buggies and the Himoto aluminum dogbones, both should arrive before this weekend. Amazon had these. Since the drive cups mate up to the same size bearings as the RC18B's, any reason not to swap in AE 21095 drive cups & 21096 pins for other wheel & tire options?
I'd also like to investigate using RC18B front and rear camber turnbuckles, 21387 & 21343. I'll have to see if our LHS has them in stock for fit.