I'm getting ready to build a large number of 4 frame deep nuc boxes, and obviously want to do it as cheaply as possible but also want them to hold up to the weather. I'm thinking of going with exterior plywood instead of 1x pine wood, I figure it will be less expensive. I do plan on painting the plywood with a couple coats of good quality paint. Those that have used plywood nucs for many years, how do you like them? What thickness did you use, and how did you secure the joints? Thanks. John