[Savage GT]

Routing started, and an attempt to equalize lane lap times makes one of the hairpins run out a little further than the other (the amount was guesswork but seems to have worked really well).

Here you may be able to make out my measuring method, some string in the groove !
The shorter lane was extended by about half the distance difference and as mentioned, seam to work well for equalizing times.
Lane 1 has 16.5M (approx. 54 ft) lane 2 is approx. 450mm (1.5 ft) shorter but has slower bends.



Some of the leftover MDF and spare shelving in the shed was later utilised for my workbench.