If you have a local hobby shop that does in-house repairs, take it to them and see if they can retap the stripped hole to accept a slightly bigger bolt. If they want to charge you for it, get an estimate, then go to the Home Depot, or Lowe's, and see if they have a tap and die set that small and the bolts to fit it. It may be cheaper to just get the stuff and do it yourself. I have never actually dealt with your exact situation before, as I don't own a nitro mill, but I am a shadetree mechanic that grew up around mechanics that is working on becoming a professional mechanic, and that is how I would handle a stripped bolt hole. Maybe someone else can offer a better solution, if so, then it would be a learning experience for both of us! I am trying to learn as much as I can about the care and maintenence of nitro mill before I actually get something that has one. Hope my answer is the right one, and hope you get it straightened out!