Put any crossing you wish that specifically has a mechanical bell. I will Allow the Safetran Hybrid because its part mechanical. No stupid Electronic Bells. I will also allow bell only crossings, or signals on defunct lines that still have a mechanical bell sitting on it.
I will Kick it off with this crossing in Maine, located in Portland. This is Revere St. 1 WCH M bell and one Safetran M bell! Too bad the crossing is in a quiet zone.

