Flat-Packable Commercial Building variant B

This is only a variant of previously published building, this time with simpler facade. This one is also flat-packable. Each wall, if printed as separate piece may be equipped with magnets (slots are 5,9 per 1,2 mm) and easily assembled and disassembled for packing. Roof is easily laid on top.
My go-to method of printing is flat on the bed. Therefore each wall is covered by separate file (A-D) and to avoid supports in walls C and D the top covers are separate in files C1 and D1 – just superglu