bk6xl mgm120 on 4s lipo

[stampy]

just got that idea in my head, would it work? im just thinking if it would work it could be faster than my original plan , which was a feigao 8xl 9920 on 6s lipo, sence it should be lighter. i dont mind losing a few mph, i just like the idea better sence i can save $$ on lipos and i like the design if the mgm controller better. but any way what to you guys think