This modular display column set includes two sets of bases and caps. The column itself is simply a 35mm diameter hexagon. The profile has the column scaled to 10mm tall which is good for testing purposes to make sure you get the fit you want in the end pieces. I removed the top layers and infill for the column, and added elephant foot's compensation. Once you know that the column fits into the end pieces just right, you can print more of them at any height by adjusting the Z axis scaling.

The end pieces have diameters ranging from 65 to 69mm. These are good for displaying Warhammer or D&D minis… crystals, I don't know. It's up to you. If they're too small, you could do a uniform scale, but just make sure you test print a column at that scale to make sure it still fits.

Additionally, you can use the columns as flushing objects for multicolor prints, since they can be scaled in the Z axis to match the height of your models. Add one to your multicolor print plate and purge into the column instead of just wasting the filament. The columns will be different colors but if you were planning on painting the display stands anyways, it's a good way to be extra efficient.

Part of my Column Display Stands Collection.