Originally Posted by heinous
if you are making top holes only why not drill 3 holes?
1 for phantom, 2 for old style spyder (the one ccm is using on t2)
this way there are 3 holes, you have at least 1 for a grub screw no matter which feedneck you use.
of course, that is if the hole spacing permits.
It doesnt really matter, its just more machine time.