QUOTE I have Carrera track (9mm thick) which I'll be attaching to MDF - I'll then need to level the surface to the height of the track using some material
Well...are you looking for a transition to grass or shoulders or to a whide boarder for the track? I ask this since also have Carrera and did not desire track boarders on my layout.
Some areas of th track are simple drop off, others go into an incline while others use a shoulder with lots of woodland scenics products.
here's what I mean...