speaking on behalf of my uncle: Me and my son both have small remote-controlled watercraft, speedboat like toys. Both boats are on 49Mhz, and when one is running and the other's controller is pressed, the first stops running. I know its possible to change the frequency and my nephew (me!) is willing to try, since he's had some dealings with circuitry. Any help would be greatly appreciated! Thanks! Note: i have gotten an answer to this question, telling me to purchase the RF crystals from radio shack and replace themnow my question is, what do these things look like? i have a few RC cars and such sitting around, and i have found in the controller what seem to be a small silver rounded rectangle which says 27.145 on it, but there is nothing of the sort that correspondes to it in the car itself. Also, in another car, i found a semiconductor chip type thing, a small black rectangle with something like 16 metal prongs on the bottom, and on the board above and below were 2 and 7...help?