Laying Peco code 55 track using caulk: problems

[videobruce]

Code 55 doesn't have a "sliding rail" since the tie design is different than code 80. Neither rail really slides, but one side does have breaks in the plastic under the rail so it can flex. That would be the side I assume you are referring to.
I do use rail nippers (as I stated)m and I do cut a couple of ties off the end (you have to do this). I haven't filed, but probably will.

I'm waiting for the CA and see how that works. Doing double duty is ridiculous (laying the track twice).

[Steamtrains]

ONE of the rails HAS to slide as the inner and outer radiuses (radii..??) of the curved track are different, making their corresponding circumferences different lengths. The ties are cut so the track can bend. If you don't believe this, try bending a step ladder into a curve....

[videobruce]

I thought you were talking about the rails flexing (sliding very freely) like Atlas flex.
Yes, I understand the rail will move outward since the distance of the curve is less than the outer rail.

[Steamtrains]

OK...Now we're on the same page...