Being bold and taking some inspiration from those around here who for their 8.5mm like a 6mm. Zooming around the outside of the house, through the gates, etc.
Overcorrected a little bit and stuffed it into the driveway with air mode still on. I have video but haven't reviewed it yet.
I think that was the last straw for the slowly failing MOSFETs, plugged the next battery in and got some lovely crackling sounds and smoke.
Those two motors had been running briefly when the battery was plugged in, I think they'd been failing for a while. With the new MOSFETs nothing even twitches.
Next up is ordering some of digikey's 9.3a jobbies.
Rear motors eating the power cable seems.... awkward. Bonus Velcro to hold the cable down?