I didn't go with a fiberglass enclosure, but I honestly can't figure out how anyone can do one big enough for a 10" sub. The 6-1/2" JL Audio required a 0.3 cu ft box that just barely fits. Then again, it is nearly square at 9"x9"x6-3/4". Maybe a funky-shaped fiberglass bubble big enough for an 8" might fit, but I just can't see getting a bigger one up there.
Again, if someone has figured it out, I would love to see it as well.