[winders]

Yes, the rails are beefed up wherever the cage attaches and where the mounting tabs are for the engine crossmember.

The engine mounts are solid. All of the air-cooled Factory race cars used solid engine and transmission mounts. Some people think that solid mounts can cause harmonics issues with the engine. My car had solid transmission mounts too but I am trying out Rebel Racing semi-solid transmission mounts now. I can't say that I am feeling a difference but maybe the harmonics are better damped now.