The t slot track from rockler is good for making jigs as well.. I have used it several times and tend to by extra just for future use. Have you considered just milling a t slot in your table? I have seen people surface there table to make it true after it is installed. After you do that mill out the bulk of the slot and then change cutters to a 10-315-032 (
www.travers.com ) Page 249 and you have your unknown size tabel....
