The jig works with basically every guide bushing that fits the cutout. Off course the amount of play will determine the size of your digits.

As long as the height of the “latch” (moving block) is excactly half the height of the cutout minus the radius of the guide bushing it will be OK.

Or the height of the cut out minus the diameter of the guide bushing divided by two, which off course is the same.

Basically you route two half digits with an horizontal overlap in the middle.

It works for almost any size of digit.

You can make really small digits.

You can use different sizes of guide bushings in one cutout, as long as you have a latch that corresponds with the bushing

This one is with an other ratio and this latch is suited for a 20mm guide bushing

These are the digits from the one above

and this is how it worked out

Thanks for watching, Rogier