I have a factory team T4 with LRP comp, Novak 17.5, amb transponder, ko 2143 servo(you can keep the 1015 for it also), trackpower 4900 also have a losi MF2 roller and a few spare parts for each.
The transponder had a nick in the insulation but it is sealed with liquid electrical tape works fine. The lrp and Novak have a season and a half on them both work good. The 4900 is older but still great for mod racing for stock you would want a 40-50c. Always balanced when charging. I have a few more T4 parts but will have to dig them out I have not run truck in a while.