In article , "Tom" wrote:

"Steve Barker DLT" wrote in message
...
Take a grinder and grind them down flush. Done.

I fonly that would solve the problem. I've got to install flanges, same
dimensions, over top the place where the original s stood.

No you don't. That's just what you originally planned to do. Making a
new plan is going to be a hell of a lot easier than removing the old
bolts.