I should be hitting the low wedges, that's the plan at least. But I think you're safe Mr 30mm HDPE.

It is geared for about 4000rpm, which is way too fast imo. I will probably rarely go to full throttle.

Yep it will be slow. 5.8mph. I didn't want to monkey about too much with drive motors. Ah well. Swings and roundabouts.