Now the staging was tested and I was happy with the results I then proceeded with more track laying and also layering of the next parts of the layout that would then form the main line..
As mentioned, I decided to use 3mm cork for my sub road bed on the 5ply timber.
By this time I had cut a large number of 15mm strips of cork for the sub road bed..
In order to get the track level looking right per the normal right of way, I marked where the track was to be placed, then used 2 pieces of 15mm cork side by side using the track middle line as the guide. I then glued this down with white glue and pins.. Then I used a second 3mm x 15mm strip of cork as the next layer to build up the sub road bed to give it that realistic high look ready for balasting in the future..
I also used the same method for the passing loops or sidings but I wanted to reduce the hight ever so slightly to give it a lower look.. I used the same 2 pieces of 3mm cork side by side and then used 1 strip of 1.5mm x 15mm cork to form the second or non main line track sub road bed. The end result is kind of neat..
In the main yard I decided to just use 1 full sheet of 3mm cork and not add the second 3mm or 1.5mm layer.. So the effect is that the main line is 3mm higher than the main yard and spurs with the passing loop being 1.5mm higher than the rest of the yard.
Here are a few progress shots...