Here's a Fastrack version with minimal fit errors (according to RR-Track). I thought this would be a quick drawing effort but getting the best fit is tedious. Inner track is 31" curves except for 48" reverse curve. Outer curves are 36" except for a couple of 60" curves entering curve on the L.H. side. I found the reversing loop fit better using 36" switches instead of 31" switches. If I was building this, I would get extra 10" straights and cut custom lengths, or have extra 1-3/8" pieces available. I don't know the precision of RR-Track's Fastrack dimensions.
Item list for Fastrack_L.rrt
NUMBER DESCRIPTION PRICE EA
(5) 12042 FasTrack 30 in straight 15.99
(23) 12014 FasTrack 10 in straight 5.49
(11) 37103 FasTrack O31 45° curve 5.49
(2) 16825 FasTrack O36 TMCC switch right 129.99
(3) 81254 FasTrack O31 TMCC LH switch 109.99
(4) 81662X FasTrack 031 fitter curve 0.00
(1) 81253 FasTrack O31 TMCC RH switch 109.99
(10) 12015 FasTrack O36 45° curve 5.49
(2) 12056 FasTrack O60 22.5° curve 7.49
(2) 12022 FasTrack O36 22.5° curve 4.99
(7) 12025 FasTrack 4.5 in straight 4.59
(4) 12026 FasTrack 1.75 in straight 4.59
(2) 12043 FasTrack O48 30° curve 5.99
(1) 16830 FasTrack O48 TMCC LH switch 129.99
(2) 12024 FasTrack 5 in straight 4.59
(7) 12073 FasTrack 1.375in straight 4.59
(3) 12023 FasTrack O36 11.25° curve 4.59
(4) 16824 FasTrack O36 TMCC switch left 129.99
(3) 12059 FasTrack bumper 11.99
