From another recent topic a couple other helpful resources were brought to my attention, courtesy of @EscapeRocks:
An article written by Bill Schmeelk from the Dec. 2007 issue of The Lion Roars, describing a good method for cutting FasTrack to custom lengths posted by @Moonman
https://lionelllc.files.wordpr...oad-manual-ver-2.pdf (Scroll down to page 42 in the Appendix).
There is also another table posted by Moonman with even more combinations for creating different lengths of straight FasTrack sections.