mac that motor has to go. i had one and when i got the NEU i took the FD and threw it in the trash. i would spend money on a neu before buying more batterys. my opinion
The efficiency of the Neu might add a few extra minutes. I might be wrong, but I get nice run times with my heavy truck running on grass. I know it's not racing. I used the 7XL a couple times in my MBX5T, but now it is much better with a small Mega ACn22/30/2 motor in it.