Flangeways too big?
What scale? We recently had this thread where I experimented with using paper with a concrete texture printed on it to simulate the concrete between the rails. The paper eliminates the oversized flangeways but doesn’t interfere with the flanges of the wheels. This would probably look best in N scale, but it might work in HO.
http://cs.trains.com/mrr/f/11/p/212574/2330970.aspx#2330970
Steve S