RE: What am I supposed to do now?!
A 1509 will serve you better, imo. 1506 would go well in a 2wd 1/10 scale or something with less rotational inertia to move. I've been running a 4s in my CRT.5 with a 1509 1.5y for a while and even driving it hard in the Oklahoma summer heat it hasn't been over 145. If you plan on sticking with small buggy wheels and tires the 1506 might do "ok".