Laying Peco code 55 track using caulk: problems

[videobruce]

The rail base is the bottom part that actually lays on the roadbed

Don't you mean what lays on the ties? The ties lay on the roadbed.

if you taper the corners and leading edge of the bottom part as well as tapering the railhead the joiners will go on more easily.

Are you talking about filing the bottom of the rail and the bottom of the end tie?? :?:

Man, that's a lot of filing. :o