Hi Stefano, On youtube you'll find a lot of information about that You can use scarf joints on plywood. Here is pretty good explanation and of course you can use power tools (planer and sander) instead these - https://www.youtube.com/watch?v=HO5SAxNjYZY Or butt joints - https://www.youtube.com/watch?v=b-IsUwQdzFg You can look at all videos there - it will be much easyer for you like a first time builder Or if you use puzzle style plans it won't be neccessary to pre-join plywood panels. you can check also this discussion http://www.clcboats.com/forum/5/thread/28425.html And of course - check links that i've put in "Links" section
Hi Stefano,