I won’t go into much detail here other than to describe where the many variants came from. The left-side Golan Arms DF.9 batteries and the left-side Atgar P-towers came from the MPC Battle of Hoth Diorama model kit. This is an old snap-together kit, but had decent detail and allowed the turrets to rotate without modifications.
The right-side DF.9s and the anti-air battery came from an AMT AT-AT and Snowspeeder reissue kits. The latter was constructed from Snowspeeder parts. Neither of these have great detail, but do feature rotating turrets without modifications. The custom heavy lasers were kit-bashed from the AMT kits as well.
The large 1/72 scale DF.9 came from JPG Castings (through Starship Modeler). It is a resin kit with decent detail, though the panel lines aren’t very straight. I did add some detail pieces to the door hinge, and I made the turret rotatable.
The small repeating blaster is a very, very old custom made from MM tank parts. The right-side P-towers also came from a MM set, the first Hoth playset. The power units and cables were taken from dismantled MM/AF Episode 1 playsets.
There are X-wing scaled (1/270) ones up on Shapeways, finally.