I see that all the work on Tom's Neon have motivated you to work on your own EV!
I noticed that it's an 8-horse Briggs you are pulling out of there. The Etek motor is rated at 8hp and it also a Briggs&Stratton.
Also, you have a CM400 and you haven't converted it to electric!!?!? Come on, you know you want to!!!
PS - I also have a Simplicity tractor - check out my snowblower attachment next time you are over. It might fit the EcoRider.