Hello everybody,
thanks for the offers for N scale track.

A bit of progress to report, I have glued down the K track and then filled in the spaces between these
with a second layer of cork as can be seen in the second photo.
Then I carefully lined up and glued on the split N scale track, first the one, left to set for 24 hours and
then lined up the second one, tested and glued that down as well.
Last photo shows the crane on the track, yes it can roll freely.

Tonight I will try and solder wires to all the tracks and connect some power.