I have found that with Atlas Code 100 HO Turnouts, that a similar problem can exist. However, instead of the frog being to deep, the problem is the frog is not deep enough. The "Bump UP" is not consistent with my cars and some cars "Bump UP" and some cars don't. So, my input here is that I feel car flanges are not a consistent dimension. Some are deeper and some are not. I have found inconsistencies in frog depth; but, they are only a few thousandths of an inch. Measuring the depth of the flange is a difficult measurement to make as there is a .014 radius in the corner between the Flange and the tread of the wheel. Per NMRA Standards and Recommended Practices S-4.2 for HO the flange depth is supposed to be .028 Standard and .71 Metric. RP-25 also effects these dimensions, too. I don't see where tolerances are discussed for wheel dimensions at either S-4.2 or RP25. If someone knows what they are, please speak up. I am getting out of HO, not because of this; but, because my interests have changed; so, I won't be considering this anymore.