Adjustable Router Template Coupler

This is my solution to the [Festool MFS-400](https://www.festool.com/accessory/492610---mfs-400#/) or [Woodpeckers Variable Router Jig](https://www.woodpeck.com/routing/woodpeckers-variable-router-jig.html) adjustable router templates. It uses a narrower version of the same extruded aluminum profile used by Woodpeckers. I have no idea if it will be available where you are, I'm in Japan and have linked to my supplier to assist in identifying the items, or as a last ditch source of getting the parts in your area. Total cost to me was about $50 US, quite a savings over the commercial solutions.

Required Parts:

* Aluminum Profile: [Alfa Frame System AFS-1560-6](https://www.monotaro.com/g/01135107/) (4 pieces are required, I used 2 x 300mm long and 2 x 600mm long sections, pre-cut from the supplier.)

* PETG filament. I tested with Carbon Fiber infused PLA and there was not adequate flexibility or friction from the parts for this to work. PETG is finicky, it must be __totally dr