Found on another forum a build post were the builder used the Leopard 1A4 electronics kit from 35rctank.com and he was able to add SGS's TVC-TRF10 MT1 module that let him add a TBU battle system .
http://www.rctankregiment.com/rctank...hp?f=30&t=3328
More on the electronics .
http://www.rctankregiment.com/rctank...hp?f=95&t=5533
Thanks
Jimmy