100mm grinder disc and drill press mandrel holders

This is a pair of tool holders for a drill-press power hone setup. See: 

Holds six 100mm x 1mm thick diamond grinding discs, and a ½" mandrel drill press adapter.

The weighted mandrel holder model has a recess in the bottom for a pair of adhesive, 1oz wheel weights (32x18x6mm). The other has no recess.

Parts I'm using:

• Wheel weights:  https://www.amazon.com/CK-Auto-Adhesive-EasyPeel-Tape-Low/dp/B072JXSN9P
• Grinding discs: https://www.amazon.com/uxcell-4-inch-Diamond-Grinding-Sanding/dp/B0725VYCCV/ I'm using a ½" to 5/8" arbor adapter (just a 3d printed bushing)
• Drill press adapter: https://www.amazon.com/dp/B07KSMJ94N

Related: 

https://www.printables.com/model/203396-graver-sharpening-jig