looking to build a new cat- need advice

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Don't you think those motors are a little small, even for a twin setup? I'd think it would require at least 540L motors.

No i dont think so the Agitator (or china clone) isnt that big but if you do dont put a XL in de cat but as you said a 540L 8 or 9 on 4s lipo . The XL is just to heavy and takes to much space . A single 540XL9 on 6slipo is enough to go over 55mph.

A friend had a Drifter S with two 380L8 on 3s Lipo speed over 56mph i had a mono MHZ Shockwave with a 380L7 on 3s speed 52mph, point is the 380L have plenty of power on 3s.

Michiel.