RACTOPMower blade sharpener washer for Keter table

I needed a way to mount my mower blade sharpener to a worktable without damaging it . I devised this washer to use bolts and wingnuts to mount the sharpener mount bracket to a Keter brand work table that I got from Sam's Club. The bolts I used are 2 and 1/4-inch or longer 1/4-20 thread.
This will probably work any bench with a 1-inch (25.4mm) hole spacing or longer slot like the one on this worktable. Bolt length will be depend on the thickness of the bench top. Since the Keter worktable has a slot over 1-inch, just using standard bolts and washers were not going to work.

This model had a single "top" ridge and 10 reliefs to give it added strength. There is also a relief cut for 3/8 washers from a Harbor freight washer kit. Since I used 1/4-inch bolts, I also used 1/4-inch washers. It may be a little kludge but it works.
I have also up-sized the bolt holes in a second model, for those wishing to use 3/8 bolts instead. However, I have not tested it.

Sharpener used
A