Welcome to WB&F.  There's a wealth of info and advice here, as well as some excellent examples of Tiki21's to follow.

Hi Brad

Greetings from Tiki #935 "Little Wings". Nice to see your Blog and pictures. Very much motivating to see your pictures and progress in the build-process. Your first hull looks very beautiful and well built!

Friendly regards and best wishes from Germany!

Yes, would love to share tips, though I think you will be much faster than I am with the build. 

Yes, main work is done in the evening and weekend. With three Children and family is very little time to build. In addition I have no room to build bigger parts, so the strategy is do do most work on smaller parts in winter in my little workshop and the hull stuff in summer outside in the garden. That's the reason for all that drawing and cutting now. And I bought no 15mm ply for stem, stern, beams and rudder, so I have laminated them out of 3 layers. So I had to cut 3 times more parts.
I saw you made the "sleeping room" bigger. I did similar, made the bulkheads symmetric and will put a rounded roof an it, so the are 8 cm more space above. Hope that will result no problems later.
Did you ever sail a Tiki?

Looks like I cant send you mails directly, dont know why. So I go on with the commenting ;-)

That sounds all good about the Tiki 21, I have never seen any Tiki in real live, but the simplicity of the concept and the proven build-process looked interesting to me.
I'm very surprised that you could go into one hull with your wife! After cutting the bulkheads I had the impression that it is nearly impossible to go into that in any way.
The cockpit will be modified in my case too, I will fix the outboard engine behind the beam (like it is on my small Feldkamp-catamaran) and than have a flat cockpit to better sleep an it. We will be 5 persons on the boat, until children become bigger and go their own way.

Yes, I would like to see the picture from inside.
What ply are you using in US? Mine is Okoume 6mm with 5 layers, marine graded. The prices here are expensive, though I didn't use the first class but second best quality.
You can Email me at tikilittlewings@hardy-buchholz.de if you like.