Pete , my statement is the honest truth ... I am not implying that it is "Black Magic" .. all I am stating is that "I" dont know how the master was made !!! I did not imply anything about "Unobtainium " as you put it ! All I simply stated was that I dont know & that my great friend & cam grinder will only grind masters on Saturdays . (or when he is alone ) That is his choice !
I simply did not want to tell folks how the Master was made when I "honestly" dont know or see it happen , so sorry if I misled or confused anyone at all.
I had also stated previously that there was an issue with the cams that we were wanting to copy (I,m pretty sure you have read all my posts). These cams were not ground by my cam grinder!!
I am sorry if I have offended you or ticked you off in any way at all!! As you have been a tremendous asset to our old car hobby!!! & a wealth of information to us all including myself !!
Cheers
Tony