I can't answer your question but the first thing that struck me about that set is the collars have different lengths. Now why would they go do that? I've used different collars on the same template and this would force me to use the thicker template material. Just yesterday I used 2 different collars on the same template. I like my Woodriver (Woodcraft) collar set because it doesn't force me to think about that.
By the way, it's fairly easy to make a base that takes any collar (though PC makes the most sense).
Last edited by PhilBa; 11-11-2014 at 10:48 AM.
Reason: typo patrol