What's your buggy??
I'm to convert my Hyper 7 pro, and with the 1515 motor, the FP 5000, 4s pack and MGM 16018, i'am to 8.6 lbs.
It's a prety heavy buggy. I would want to have an MBX5R, but don't have $$$ for this now.

But 8.6 lbs is lighter than my mugen truggy at 11 lbs