Inset track sections
16.5mm gauge code 100
Big stone (suit O scale or bigger)
Inset panels which fit over sleepers . Designed to fit Peco O16.5mm track
but might fit other makes.
Just cut panels off along score lines between panels. They should fit over sleepers easily, but might need trimming.
Suitable for straight, curved and flexi track.
Suggest using PVA glue to fit down.
If track is already ballasted, ballast will need removing before fitting panels.
Intended to go between rails, but can also be fitted to outside of rail.
more 3d printed models from Recreation21 here