It sounds like this problem may be simpler with Brios than Duplos as Brios only require 2 curves to turn 90 degrees vs 3 for Duplos, but.. my solution to this h

It sounds like this problem may be simpler with Brios than Duplos as Brios only require 2 curves to turn 90 degrees vs 3 for Duplos, but.. my solution to this has always been to use the grain of the wood floor as a guide (which they have in this picture, but aren’t aligned with) - start your track aligned with a floorboard, and then every set of 2 (Brio) or 3 curves, check that you are either parallel or perpendicular to the grain.