That's what I did as well, I have taken pictures up to this point, I now have the frame attached to the ribs, I am getting the plywood this week, the lumber guy at home depot told me that I can use 1/2 plywood through out and that it actually can hold more pounds per square foot than the 3/4" and that should take my weight down a bit. Something I think I will do once I cut all my pieces is I will glaze them with a fiberglass resin, should prolong the life of the wood somewhere around 10-15 more years depending on the use. Mine is actually a 12' of your exact same boat, so I will have to adjust some of the lengths and what not of the frame to compensate for the loss in length on the boat. Thanks again for posting your build, it helped me a ton in mine. something else I did with my subfloor frame is I used Gorilla glue (wood) and put inbetween every single joint to make it that much stronger and prevent screws coming lose or vibration noise, those things aren't coming apart..EVER! Lol good luck fishing this summer I hope to have mine done in the next month. :shock: