@RWL posted:Now, I did take a needle nose pliers, and very gently bent the point toward the mating track, then gave it just a bit of a rotational twist, to bring the top edge into position as well.
The Berkshire now passes thru with no issues. The front truck rolls thru like it should. I plan to tweak it a bit more, and then smooth out the hump a bit, with my Dremel, as well.
That's great!!! I like your style! I was tempted to suggest the pliers because that is probably what I would have done. I often do things to my layout that makes some folks nauseous. 
I use a 6" plumbers level for side to side shimming... and, I don't screw the track down tight ...just barely enough to hold.
What is under the green matting? If it's just ply I would consider adding homasote or sound board (sound board is recycled sugar cane fiber down here in New Orleans) under the matting. It adds a tad of give and leveling that my trains find desirable. It would also quiet the Fastrak quite a bit.
I think you've got this! Rock On!
