with the virus there are no bicycle tubes in 20 inch above 2.10 where I live. my bicycle tires came from chain reaction cycles in the uk and they had no tubes. Amazon, samething, id have to wait til august for delivery but I could get 16x2.50 moped tubes for the bicycle tires by this Monday so I bought those. I think they will fit and be less prone to get flat.
I don't think I would put moped tires on the front, too heavy. I was running schwalb marathon plus 20x1.95, great tires, never get a flat, you can 2 wheel around corners but you feel every little crack and pebble in the road. holy roller 2.20 im running at about 20 psi and you don't feel too much, ill do train tracks at 30km/h/20mph and theres no bang to the front end but you cant 2 wheel around corners. I went to 2.30 to see if I can inflate the tire to a higher pressure and still have the soft ride of the 2.20.
I thought about getting suspension for the front end like adam333 but then the trike would be too wide for the bike lanes, you would have to have one tire in traffic or the curb gutter. when your stuck in a bike lane with traffic you cant really dodge around road garbage with the back tire so I have to get a moped tire.
the good thing about your V3 is youll have enough power to get away from the vehicle that's driving with 1 tire in the bike lane coming up from behind you, get a mirror and get a flag
is your battery behind youre head? it will flip you around corners if it is, I didnt see your battery but tool cases like Dewalt for drills will hold 2- 18s 4p packs and fit right in front of your seat, you can get empty cases at the pawnshops for $5