Thanks guys, yeah, thats a good point re tx only, i wonder if the reset button could be modified and extended along with the power source, perhaps even a PSU, i take it the heater is just that, it adds nothing to the power, i think i asked somat similar beofre, i forget now. I remember you saying you can extened the battery pack, sif that can be done then most definitely a low voltage psu is possible too,things to think about i think, i think the vital part will be to kep it water proof. It also looks like thers only eBay and Weather Spares that sell it separately £160+ or £140+, i prefer to use amazon but they dont sell it on its own :/