i did it it works great. takes some time but works great. i drilled the chassis. i used my old g4 chassis to line it up with the g4s chassis, marked it drilled it then marked my kfactory chassis then drilled it came out great & i moved the batt. to where the g4s batt. goes using my g4 top plate. had to cut the GF out like the g4s then made a new batt. pack. took alot of time but worked out great. i call it my g4STE (g4S TWAN EDITION) lol. in the pic you can see the batt. & almost see the steering.