[B44&501xRacerEX]

I use both. Velcro on the sides since the car came with a couple strips.
And pins on the body. 3 pins isnt so bad, it's quick to get the body
off and change batteries. If you get the big blue dynamite clips, its alot faster to remove
the body and return to the track! It's almost better to use velcro because the undertray
and body wont get worn out after removing the body so many times.

I plan on doing the same with my 511 body
which Im supposed to be getting this week. I know my lhs is slow on
a few things, as they had to special order the stuff, I call them everyday
to check on it.