How did you guys fix the engine mounting rails on your Phenoms? I'm thinking about casting them up to square with a silica-epoxy mixture or something. Not quite sure yet.

Or did you just leave it like it came, bolted the engine on and hoped for the best? I just can't see the engine staying put in the long term.

What kind of material is in those engine mounts? Are they strong enough for sheet metal screws, so I don't have to drill all the way through?