Sandbag emplacement remixed form Tiger-ace 1945 stowage pack for my bolt action Italians 47mm AT gun.
This is scale 1/100. To make it for 28mm miniatures enlarge it 178.5% and it will fit as shown on a 60mm base.
Its not perfect and isn't totally flat when sitting in Cura, this can be easily fixed by printing with support.
Enjoy and don't forget to post a make :)