Its a 5000 turnigy it was 50$ only the thunder power next to it was 180$ lol.... i run a rx8 and a 1900 in my eb48 and it runs super cool with a 16,17,18 tooth pinion! I would try the sct410 in a 10 minute practice or race before worrying about making it lighter! Could be the ratio or just a more efficient drivetrain