Patent it (oh you can't now, you've made it public
). Make loads of them, market them and sell 'em.
Make sure they're adjustable, galvanized or even plastic (as it's only for the slipway).
Once that's done I'll have one. You'll have to hurry mister, that's a good idea and you need to get the drop anyone that sees it's potential.
You're onto something.
Just get the tow hitch onto it and you can launch almost any sib anywhere.