Paul....I decided to use Okoume marine plywood from Canada and West System epoxy for my Mini. I think it took me about 30-40 hours to make it. Being the first boat and first time working with epoxy is why it took so long. I made the sides a couple of inches higher and reinforced the transom to make it sturdy for a motor and its still a very light boat. This was several years back and now that I've retired it will get more use. Because I sold my truck that I kept at our cabin in northern Wisconsin I plan to use the johnboat as a car topper and it'll work great for getting in and out of the spring ponds we fish up there for trout.
I get a lot of compliments on the mini mac and its become kind of an heirloom within the family. It's been stored hanging from the garage ceiling.