Mike, Looking at Logan's link, I have the tools and equipment to do such a job rather easily, but some are not portable and I don't relish the thought of going to Milwaukee. If you can get the inserts shown in the aforementioned link (or suitable replacements) and want to take a ride down to Twin Lakes, we can drill and tap the bobbles here, provided the bobbles have a solid base that can be drilled and tapped. More precisely, you can drill and tap them with me looking over your shoulder. My friends and I call this the "buddy system." None of us want to work on stuff for money, because then it's no longer a hobby, it's a job; but, we'll help just about anybody do just about anything as long as they're willing to lay their hands on the tools and get a little dirty.