"C" battery powered engines

Likewise, I tried to revive my first Edward again and didn't even get a jumpstart (even though I exposed the 9V wires properly since the last time). I decided to clean out the drive unit, but one of the running board screws is too hard to remove (dried up paint from my poor cosmetic restoration attempt). While I did manage to remove some fluff and residue, there must be much more than what I saw from outside. The wire connections looked alright from what I could tell, and the screw might need a few more attempts until the dried paint comes out. Now I know what a good decision I made by getting the TrackMaster one before 2014 (the tables have turned). After succeeding to get the running board off, I'll take out the motor and see if it's only clogged and the wires are in place.