i'm looking for info on these hulls. there are none here in texas and i was just wondering if you guys could answer a few questions for me. i really just want one for a project/cruising boat. here goes: what type of aluminum are they made of? are they lighter than a standard ultra light hull? how do they handle? how well do the rivets hold up? are they more prone to leak? is it ok to put polymer on them? is it ok to run dry land with some bumps or do you need to keep them in the water only? who builds a good riveted hull? thanks for the info in advance...