OK, a few pics, and a drawing.. These are of the proof-of-concept trial pieces. I have some more ideas that I'd like to try, and will briefly discuss these later.
It's pretty obvious what it is - a simple spacer that fits over the existing threaded boss/stud on the factory windshield bracket, with a hole drilled and tapped the necessary distance away so the hole in the shield lines up with the spacer when the spacer moves the shield out from the windshield bracket.
Roger Lohrey was my co-conspirator in this test, and he kindly machined the test pieces (and made a nice drawing from my doodle of an idea.)
And the drawing:
Note that I also used a spacer I had that fit exactly into the hole in the grommet, and was the right length - so the grommet isn't crushed. The load is taken up by the spacer, and the grommet more or less floats a bit (which is how the original mount to the factory bracket works.) A suitable one could be made from some 3/8" OD tubing pretty easily.
OK - my ideas on refining the design..
- Make it wider so the entire rubber grommet sits on the surface
- Make both ends rounded off - mostly because it will look neater
- Step the two ends on the side facing the windshield so the end that mounts to the bracket is slightly lower then the end the grommet seats on. Currently I had to file a corner off that end that was hitting the windshield due to the complex curvature of the windshield.
- Make the recessed hole for the mount to the bracket big enough (it's ALMOST..) so the stock screws can be used to mount it to the bracket and have the heads recessed.
Nothing too hard - I've just gotta see if Roger can help out again, he's been very generous with his time and providing machining and engineering skill.