Nice Maxx. Very similar to my maxx. I bet you will have your hands full with the 1521 and 8s. Mine was just too much with the 1717 and 6s, couldnt keep traction at all... whats your gearing?
Maxx - FLM, MMM, CD Med.36x706s
Raja - FLM Ext. MM, 1512, 4s
SC8ight - MMM, 1520, 6s
D8T - MMM 1717 6s