Welcome, thank you for reading the forum before posting and thanks for the complements on my storm. I ran the SCT with a mamba max pro and ran up to 83/21 on 3s with that motor without heat issues during the hot Ontario summer which is likely a big cooler than your summer. You would be surprised a how much you can increase the gearing with that motor but you would have to. My 4600 setup with 21t /88t (not 87) gearing goes 38mph on 2s and it would be quite a bit slower with a 3800. Try playing with the gearing calculator:
With a 19t pinion the 4600 vs. 3800 motor go from a max speed of 36 to 29 mph, respectively. With a 23t pinion the 3800 goes up to 36 mph. Its a calculator so take it with a grain of salt but its good for comparisons.
I bet you could get up to a 21 or 22t pinion with the stock spur without problems
I run thunder power G4 30C 5000 mAh 3s, G6 65C 4300 mAh 3s and G6 35C 5400 mAh 2s batteries. They cost more but work very well and always stay in balance - I have never had to balance them.