Guys Thanks for all the good info,I have a set of left hand drill bits coming, the good cobalt ones, along with several center cutting carbide mini end mills in several sizes. I am hoping, I can get a thru hole thru the screw shaft, then will add a drop of Kroil to the hole, to allow it to seep into the threads etc.I am not sure what the frame material is, looks like alum or that pot metal type material etc,I am going to very carefully start 3/64" center cutting end mill for the first hole thru the shank,then try the next larger size of LH drill bit and just keep enlarging the hole etc.If i get positive results, then I'll drill/tap to the next larger size of screw etc.I'll post the results, regardless the out come, Tia,Don