Finally got a cable for my phone camera, so I can now post some pics. Used a Diggler Full Suspension, adult-sized, mountain kick scooter. X-lite 5303 with four, 8.2AH 36V Lithium batteries. I've ridden a Goped ESR (modified with four 12V 15AH SLA bats) for several years, and it's a great little scoot. But I have to admit, this baby is a blast to ride! The larger BMX wheels are better suited for riding on rough streets than what the ESR could handle, and I've got a much greater range (30+ miles) and speed (24mph) on hilly terrain than my modified ESR (10 miles @ 20mph).
(Scooter)http://site.digglerstore.com/products/f ... nsion.html
(Batteries)http://us.itselectric.ca/product_p/37v- ... -8.2ah.htm
The stock deck was only 6" wide, so I had a custom 12" x 24" deck CNC-ed from 8mm aluminum plate to my specifications. It's now a much more comfortable and stable ride.
Because I currently have to haul this up a narrow & steep stairway (three flights), I've kept the batteries in removable panniers. However, the Velcro is rapidly deteriorating and I'm having a hard time keeping them on the frame. Eventually I will permanently attach some small ABS pistol cases for the batteries.
I should also be receiving soon my custom torque and nut-retention arms so I can get rid of the stock Xlite ones.
With stand up scooters, I've found that the thumb throttle is best. Since you don't have a third point of contact by not having a seat, your grip is pretty important. The full and half grip throttles put just too much strain on your hand trying to keep it steady, and bumps will cause you to accidentally accelerate - which can be a bad thing depending on your situation.
This particular model of Diggler scooter uses disc brakes on both front and rear wheels. I chose to mount the motor on the back - which resulted in me loosing the rear brake. I can still stop fine, but I will eventually have an adapter welded on so I can mount caliper rim brakes. Another option would be to go with a front hub motor that has a front disc like the Velectis or Ezee (the rear wheel is the same size as a standard front bicycle wheel). http://www.ebikestop.com/brake_brake_adaptors))351.php
I think if I was going to do this again, I would use the Xlite 5304 @ 48V instead of my 5303 @ 36V. Although it climbs hills just fine, I'd like a bit more pick-up to get across intersections quicker. The 3504 x 48V configuration would also provide a bit greater top speed - not that it really needs it.