I got my motorworks SUV in the mail yesterday. I haven't had a chance to try it out yet. it is a 49mhz. This will drive two of the motorworks cars I have (I hope). I did notice that the crystal used in the remote is a real common type.

For my 27mhz motorworks, I think i'm going to mount a SPDT switch on the remote with two crystals. I'll take a 27mhz crystal out of one of the other remotes I have. That way the remote should be able to drive both with the flip of a switch. I really should do that to all of my remotes anyways.

6 batteries is a lot for one of these though... I don't have that many batteries to go around, kind of disappointed there.