I spent the better half of the afternoon whipping up a prototype for this 5-frame nuc with 3/4" pine boards. I didn't have any 1"-12" lumber. So, I busted out the Kreg pocket hole jig and laminated some board to the widths I needed. I will modify the lid on the next one to attach the lid end on the bottom of the lid like you would see on the plywood version. I have found that the best way to position/fix the ends on bottom of the lid is to place is to attach all four side of box, place the lid upside down on work space and then the box on top. I then affix the ends to the lid aligning them ever so slightly away from the box end to allow for some expansion (maybe 1/32") but remain snug enough also.
I basically completed the box minus aluminum flashing on the lid and painting it. Next, I brought it in and remeasured it to better allow for frame placement including bee space at the bottom of the frames. I drew simple sketches of the parts along with the measurements.
Jury is out on this one. It was awkward compared to the more flexible plywood and loses it affordable margin. You really need a 1"x12"-10ft board to complete one box. You will have a little scrap left over. As of 3/5/2014, the board is $19.46 at Home Depot and $14.69 (on sale) at Menards for #2 pine or white board. The 1/2" (15/32) plywood is still around the $16 range and you can get four nice nucs out it.
I placed a thin coat of Titebond glue on the exposed plywood grain last season before painting and let it dry overnight to assist in keeping the water out of the end grain. I have used the boxes for swarm catching but plan on using them for splits and wintering over this season. If the plywood nucs decay, I will just build more.