I've looked on the SBA website & a few others to find some designs for nuc boxes but can only find designs for hives. I was thinking of making a 4 framed nuc box (or 2 ) and think I have an idea for dimensions, but would really appreciate some advice before I waste a lot of my time (takes me forever to saw through wood) making one the wrong size.

I was thinking that my inside dimensions need to be 371mmx150mm x 225mm? Would it need to be a bit deeper if the floor board is being nailed flat to the box? The 2 short sides will need to have space at the top for the long lugs on the frames. Does it matter what type of wood I use as these are used for a short period of time- I have an old wall unit to recycle.