Subscribed... Good Job so far man. You definatley have a great plan for going about this...
I think the 1717 is a good choice as well because it can probably take close to a 1:1 ratio on the pinion/spur, with the GRP tires being so light it will run fine. Probably giving you more attempts at 100+ before it heats up too much as well. Just gotta run some extra voltage... The GRPs are just great for the speed runs too!
Maxx - FLM, MMM, CD Med.36x706s
Raja - FLM Ext. MM, 1512, 4s
SC8ight - MMM, 1520, 6s
D8T - MMM 1717 6s
I just picked up a set of those tires from Amain for my Losi 8ight. I might try to do something similar but with the 1515 and the right gearing. Good luck!!!!!