Assuming there would be another event in Edinburgh (or Scotland for that matter) next year, I'd definitely try to get one built for then. Even if there isn't, I might aim to build one next year anyway just to have something a bit heavier to show off to friends and family :P

Also just found an electric wheelchair on eBay sitting at £1 with two days remaining. I'd be tempted if it didn't involve a trip down to Shropshire.