Can anyone provide information on what the engine stringers on my Ericson 27 are comprised of? The question is prompted by what is a longish and frustrating story that I'd rather avoid telling. But the short story is I'm contemplating building up the engine stringers (probably with some professional help since I'm not eve sure I'm using the correct terms here), to more confidently secure the engine. The end of my story is that my engine is on shims and the engine has dropped slightly putting things out of alignment, and I want to do this right. Someone asked what was under the stringers (as in what are those lags bolts bolted into) and I couldn't tell him. Thanks. New problem, new saga, new learning experience I guess.