Parts will fit toghter better and reduce delamination on the edges if you router a small chamfer on the parts before assembly.
I have used screws only to hold the box together but glue could also be used but is not essential.
I have screwed castor wheels to the underside of my box for easy teansportation when the box needs moving to empty.
The inlet hole on the lid will most likely need adjusting to suite the cyclone attachment you purchase.