Heres how we solved the lock problem. At Lowes we bought a standard Desk draw lock with a 1 inch shaft. We then drilled out a shaft diameter hole in the side of the fuse below the ?? Angle making up the upper edge. See the lock after mounting on the outside of the fuse.
Then we cut a channel in the top surface of the edge for the arm of the lock to come up through.
We then put a small length of ?? angle on the inside lower edge of the f the canopy frame.
Then we cut a slot in the arm of the lock to capture the piece of angle.
That?s it. Caution I would not buy the lock from Aircraft Lowes. It had too much play in it. But we made do with what we had.