Product review (2 stars): This Milescraft interior door mortising kit seemed to be a good idea. I never did learn how to use ...
Well, I had 4 interior doors that needed to be hung.  This Milescraft interior door mortising kit seemed to be a good idea.  I never did learn how to use it after trying in vain.  I finally gave up and went back to tried and true method of using old doors as a template and marking mortise outlines with the old doors.  Got my doors hung and they're fine.

I'll try and put this thing craigslist one of these days, it's in storage brand new.