Hi Mike,
That was my thought when I put in my offer to buy them. However, they’re a GENEROUS 1/2" in outer width and to dremel or naroow them down to 7/16" would leave very little side arm. I still think about this but the side arms would have to come down to slightly less than 1/8" in remaining width. I’m worried they would break in the process.
However, perhaps a machining business would know best. I will get in touch with one and get their thoughts...

