Okay, hopefully this will be the last thread about this! I charged the engine up as the instructions said (actually, it was only a few hours at a time, but rather than 6-7 hours, totaling more like 10 hours), but I am still having trouble. It sounds great at slow speeds, but at high speeds, the sound is terrible. It actually cut out a time or two. I took a video which gives a glimpse of what it is doing:
Do you think it is just the battery? I plan on getting a BCR for it at York, so that would not be an issue. However, if it is something more, I would want to get that fixed before I introduce something new to the equation.