custom fiberglass box question

ok....to test strength, theres a simple test you can do. First find a ladder that is at least 8 feet high and then get your hands on a 10 pin bowling ball, 11lb. should be more than enough.......................................  

I got an idea...... build it as strong as possible.   Why build it half way, when in a year or two JL might release some crazy sub that can flip your head inside out.   When i build an enclosure, i don't ever have to worry about this petty strength testing crap.  If you cant afford to do fiberglass RIGHT, buy a pre-fab.

not trying to be a dick or anything, but seriously, you shouldn't have to test. You should be able to tell by looking at a box whether it is gonna crack or not.  Especially if your making it for a customer.  Do you want to risk a customer coming back because your custom install failed?......................

this is a full fiberglass trunk..  but we still did the "bottom" of the box in mdf kinda give you some ideas..

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