I have been working a bit on the Korber 305 sand house kit to bring that back to production. I was looking for some improvements to make, and I have been thinking about making a different same tower to come with the kit.
As I looked at some real prototypes, and some of the HO kits available, the sanding tower was able to be located apart form the sand drying house, which on the current Korber Model is not possible.
I still have some more work to do on the tower, including adding some piping/hoses, but I think you get the idea. This is made of laser cut wood, and will be painted black and rusted a bit like a steel support structure.
I am also looking at making the sanding storage box out of wood.