Drachir21, what do you mean by check out the tunnel hull, is this a good design or something that you are leary of. A friend of mine has ordered one and it should be ready some time in April. I'll be able to check it out then. I've rowed a Lavro many times and know them pretty well. Bob D. since you've had both glass and metal which one is colder, I know sleds can be very cold in the winter months, is this the same for aluminum drift boats.