Can I get a little advice? I have an E-Maxx 12020 with a strobe slipper on 14 cells. The Warrior 8XL that was on it died and I have a Fiego 7XL. The 5 mm shaft does not have an indention in it. Do you dremel one in? Anything to be aware of when doing it? And there are no gold plugs, do you directly solder to the ESC? Thanks!