I think the HL electronics are fairly similar between their various models, with the exception of the sounds programmed in the RX18 ESC's. I wrote a couple of threads describing myefforts toinstall an Asiatam recoil unit <font size="2">http://www.rcuniverse.com/forum/fb.asp?m=10033386</font> and a DBU/DBC <font size="2">http://www.rcuniverse.com/forum/fb.asp?m=10031192</font> in my HL Panzer 3. I hope these might be of some help.