You're Welcome Bud
The real key to the jig is the side support parts. the original plans show a stationary side support parts But if they down move up and down you can't use anything that's taller then the side supports , and many times you will use 3" to 4" skirt boards on your projects.
You can also make a extra side support boards so you can put slots in 6" or wider boards.
One of the neat things about the jig, you can put slots in at a 22 1/2 deg. if you have the need by adjusting the side supports ( one high one low and cut on a 22 1/2 deg.or a 45deg.

and the bearings will track right on the button and put the slot in true.
And by using the floating type teton you can do it all on one jig.
Try that one on a router table or with a standard plunge router setup.
Have a good one
Bj
NOTE**** you can make your own teton inserts quick and easy on the router table by using a bead cutter bit or round over bit and some hardwood

I make them 2ft long or longer and then cut off what I need ( 1/4",3/8" and 1/2" thick ) you can buy them premade from Rockler but they are not cheap