I'm a bit late on this one, but I thought I'd give a differing opinion (makes things interesting, right?). We've glued tons of boats here in the West-- You'll never get your castings as tight with shims. BUT... like those other guys said, and I sort of agree, you need to view it as permanent. However... If you do need to get the casting off, all you need to do is warm the casting with a torch. It only takes 140 degrees to melt most Epoxies enough to get the castings apart. It's messy-- I've done it about 10 times. West systems seems to be the most reliable at "melting" at 140deg, other epoxies vary. I never glue boats right out of the box, though some people want to, as I think they "settle in" after a season or two. After that, I'll glue away. Get it square, you only have one shot!
There you have it, the pluses and minuses.
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