Nice job Chris! I've often thought that a mount similar to that, but much longer top to bottom, would be a great way to store the outboard. When you want to put it on the dingy just pull a pin and slide it down to water level and hop in the dinghy to transfer it to the transom. Or if the main engine/prop is kaput, use the outboard for propulsion like you are planning to do. When done just pull it up and lock in place. Seeyalatermoonglow has a nifty setup that does what I"m doing a crummy job of trying to explain, his uses an aluminum tube to go up and down on.
SV Laurie Anne
1988 Brewer 40 Pilothouse