I can see this being a good alternative for the constructually challenged amongst us.
If you factor in tool costs, it becomes an even better value.
The one change I would make to it, were it mine is to move the spinner down to the left of the left stick.
I've never figured out how people play spinner games with the spinner at the top like that, especially on some of the home-made CP's I've seen, where you have to dodge sticks to get to it.