Linocut registration pins

I've been lino-printing for a while and every now and then I start a multiple-color project.
Registration has always been a pain in the *** even though I've found several methods and infos about that.

The one solution I found might be the best is Ternes Burton registration pins http://www.ternesburton.com/. This method is very easy (and of course ternes burton did not invent that): registration is about position and rotation and two pins are enough to get these points fine. But do I really n