HI jigstik
You can make standard dovetail splines with a dovetail bit
All I can say the OP jig will do it all with one jig plus more on the router table..
http://us.oak-park.com/catalogue.html?list=RTS-MGS-
see video on the same page...

===========
http://stots.com/ http://www.woodshopdemos.com/stots1.htm
I don't have one but I don't like the look of it

Just one more of the plastic tools on the market now days.
=========