Let me get this straight....You wouldn't weld it up and recreate them if you were in my position?.

Can you guys make me feel better and say that my motor wont blow up if I leave them be? All I need is piece of mind. If it loses 1-2 hp I won't mind.

Maybe some marine tex or JB weld will do the job.
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MC21 300R w/SE bits, Rossi 2001
MC28SE Silhouette Repsol