Thought I would move the restoring part of this kit to the proper category.
Problem, Seven unwanted holes, One large, two medium and four small.
Triangular mount (size from Stedi, Thank you!) will cover three holes, maybe, the paper template is barely covering one of the holes.
Dolfan pointed out (thank you!) that the original mount was a spur bracket set up for a post type of tom mount and the big hole could be factory. I have been unable to find a picture of such thing so I'm still foggy on that.
I would love to plug the holes with wood and a matching silver sparkle patch but I'm afraid that will end up looking bad.
So, in the thinking stage at the moment.