Attaching track to foamboard?

[RobertInOntario]

I've been gluing the track to the foam of this layout with Gorilla Glue and, overall, it's worked well. However, I have noticed a couple strange things. In some sections (where the glue was used) the trains run through them a little roughly -- lots of clicks and clickety-clacks. As far as I can tell, there is no glue on the tracks. The worst section is at one of my (new) Peco turnouts where the roughness is really noticeable. Occasionally, some of my older locos (with the larger flanged wheels) will derail.

This sounds bizarre, but is it possible that the glue has affected the ties and possibly the track gauge? Guess I should get my NMRA track measuring gauge out and check it... :oops:

Rob