umm...do you really have to ask on this thread? You could have done it on mine.
1. Watch my videos. If you think my start up is cogging, then you haven't been on a high kv belt-driven board.
2. what is autonomy based on battery life? If you are asking about mileage, I get 1Ah per 1 mile on 2 motors with 95% riding on more than 20+ mph. So before I had 5000mah battery, I got 5 miles. Now I have 10000mah, I get 10 miles.
3. I have not recorded the incline capabilities, but it is strong. I'll download an app and check it for you. Just need to find the time. But hill-climbing will depend a lot on your voltage and battery capability.
4. V3's will be offered after I'm done building a complete board prototype with V3 Hub motors, swappable batteries and no-grip remote control. I plan to make it look like 313 skateboard's Vector Hybrid model. It will probably happen next year already.
5. I like the A-specs, they are very thin. I have not used space cell but I think you would like to have a battery that can at least push out 100 amps, especially if you plan to climb hills a lot.
6. Low voltage alarm is better because it tells when to take it easy, instead of bogging down all of a sudden.
7. I would go with 8s or more for hill climbing. The hub motors are not the problem, it's the ESC and battery that you are going to use.
Those are very cool boards. 8)