These are pics of the one like I made.
The bottom drawing is a little strengthening piece that the inventor didn't have on his. Mine wanted to bow up under load without the steel brace. You might wonder why not just make the whole thing out of heavier metal, but the "fingers" that hold the bucket down have to be able to flex a little. CAUTION ! Never rotate the engine with a shim out ! It will knock a chunk out of the bucket.
Here is the actual one I made and used successfully.
Sorry about the blur, my old flip phone piece of $hit camera.