I've noticed in your pictures that you are using various items to hold your cork in place as the adherent drys. I have always stuck track nails or thumb tacks through the cork just enough into the foam/plywood to hold it in place until the glue drys at which point I carefully remove them. I say carefully because if you just yank'em out, invariably you will pull some of your newly installed cork up as well. Been there done that. By using the track nails (or thumb tacks), you can use lots of them and re-use them later AND, you can lay as much cork at one time as you have nails to do so drastically speeding up installation time. Looking good so far! Also, previously you were asking about the correct order of construction of a layout. I don't think there is any one standard practice but if you click on any of the links in my signature (with the exception of the father/son layout), you can see how I constructed mine - track first, then scenery.
P.S. Also, I have found that sometimes when laying cork on tighter radii without temporarily nailing it down, sometimes the cork will bow unexpectedly (usually after you walk away for the night) and give you some nasty bumps to fix before laying the track.