Congratulations! This must be the perfect follow up to Michael Cox”s Swing Up Tool Holder for external threads in MEW 178! Patented allready? If not, would you care to write an acticle on the construction of this simply perfect tool? I think the readers would greatly appreciate it. Looks simple to make, but the idea behind it is really great. I had tried to design something in that order, but only came as far as the result, that the rotating cutter could not be much bigger than half the diameter of the bore to be threaded. Then age and heat made me withdraw from further thinking.