The frogs on my Aristocraft turnouts (10’ Xtra large) were bouncing my little 0-4-0 Porter almost off the track. The obvious problem was either, the flanges on the little Bachman engine were bottoming out on the plastic frog or the frog was taller than the track.
My quick fix with the turnout in place with a Dremmel tool to solve this problem:
For the flange-ways I used a plastic cutting wheel on a EZ Change collete to carefully relieve enough plastic to allow a smooth passage.
Then to carve down the top of the frog, to be level with the track, I used the Dremmel again with the router base attachment and a 3/4" blue-gray flat bottom grinding stone. I set the stone flush with the router base on the diverging tracks, off the area of the frog, then carefully leveled the frog height with the track. I have a very slight scuffing on the track adjacent to the frog which could be resolved by using a thin piece of paper to gauge the set of the stone above the track.
Voila! A smooth passage for the little Porter and four wheel caboose. Why wasn’t this done right from the factory?