The 5c charge rate means that I can charge at a higher rate if I need to. My peak charge rate is around 6A and I usually charge at 3-4A depending on the battery.
The remainder of your post is covered above.
As far as ride time there are too many variables to consider, so ride time will be whatever the ride time actually is. This is a prototype so there are many areas that may or may not need tweaking for best efficiency…
Have you managed to ride this yet? Cool project 