Awesome, have you thought about using larger cars, I realise it's a juvenile waltz. Also are you planning on touring with it, It'd be good to see your hard work earn some money :D
Waltzers have steeper hills, thats what gives it spins,if this one had steeper hills and probaly some taller rails at some parts it would have given you a rougher ride,. and waltzers always have people pushing the carts too,.