Have a 20+ year old NOS ramp that needs a few more holes in it, some of the mounting holes are missing for some reason. I'm a bit terrified of destroying it, figure it's probably more brittle than it was 20 years ago. What's the proper way to drill it out without cracking it? I really don't want to destroy a new $90 ramp. Was thinking drill press, sharp metal working drill bit, and backer block of wood? Any suggestions or tips welcome, thanks!
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