Reply by Rick L

http://www.northfieldwoodworking.com/gauges/gauges.htm
You can make these from scraps. Setting planer knives off the head is the most accurate and quickest.
I’ve been tuning machines for 30 years professionally and I have a base that combines all the functions of the Northfield bases and I can do do planers, jointers and lockedge shaper heads. The Rotatacator falls far short of anything useful for the money…

-- Few folks really know how to maximize the potential of their tools!