Yeah maybe, the handle bars are like a t bar, you pull and push at the same time so Heavy maybe not, twitcy is feasible. Only one way to know, I can always revert it to a wheel afterward. Been looking at vintage ply race boats and it looks easy enough to set up a wheel, growing up on trail bikes you get accustomed to hanging off handle bars. Me, Mr Scounge O has been also looking at 12 volt geared motors on eBay for an alternative to to a throttle set up. To set up forward controls is a $700 budget, already have the pulleys and tensioner and the geared 12 v motor are $12 to $30. I will speak to the hobby shops about a gear shift, an actuator with three positions? I will post in a couple of months the solution, any help would be greatly appreciated.
Twitcy is right, but wouldn't that be an issue for jet skis, they have a similar set up?