Thanks guys... I have pretty much made the decision to use the stainless fasteners, I am still up in the air about the panels as of now, I keep reading that the marine grade plywood is more susceptible to deterioration than the treated panels... Found the website of a dealer who claims to sell the old recipe of pressure treated plywood specifically for pontoon floors, supposedly it doesn't have the amount of copper in it that the newer PT stuff does and won't damage the aluminum as the new product does... Supposedly you can still buy the plywood with the same recipe that was used before the EPA got into the mix around 2003 or so, it is called CCA and the newer material that is causing the problem contains a higher concentrate or copper and is called ACQ or something like that so I am still in a learning mode as of now... Thanks for the phone number of the wooden boat shop in case I need it... I have all winter to get this project finished so hopefully I will know what I am doing before spring fishing season gets here.