Hey KC
Here is one I made for Dragon tracks for a 251.
These were a bit different in that the guide horn had to point
down after linking the pieces and that little pad was glued on top so
they were workable.
This is one I use for Friuls metal tracks but can be used for
plastic magic tracks too. Tracks are held in place with double
stick tape.
Another used for Friuls but can be for both.
But, for magic tracks this is what I usually do... Take a piece of
2" wide masking tape long enough for the run of track and tape it down to
the bench sticky side up. Take a 1/4 square strip of balsa, or something
similar, and stick it top the center of the tape. Start putting your link
together with one side against the wood and they stay nice and straight.
You can do the other run on the opposite side of the wood.