I worked on this over the summer. Of course, I started it before the DML Pz. III J came out and I was too far gone to go and start over with that kit.
So, here's where I'm at now:
I used parts of the CMK conversion, but a lot of the stuff was unusable in my opinion. Those items were scratch built out of styrene and other bits. I still have to add the brackets for the winch to the sides of the engine deck. Those have to be scratch built and are a real ***** as I didn't do them before I attached them to the hull. They have to conform with the arch of the engine ventilation and also be parallel to the ground.
I didn't like the included resin box so I built a new one out of styrene according to the plans in Panzer tracts 16:
More pics. The drive and idlers, as well as the box are just placed, that's why they look off-kilter in some pics.