This simple variation of the classic WDT tools is designed with slightly loose tolerances to ease needle insertion and accommodate epoxy gluing. 

BOM: 

• 8x 75*0.35mm acupuncture needles. You can buy them in bulk on Aliexpress. 
• Epoxy glue 
• Some abrasive surface (sandpaper, grinding stone, brick wall, whatever)

Instructions: 

• Carefully insert the 8 acupuncture needles in the mid section without bending them.
• Slab epoxy on the needles' handles and the sides of the cylinder part of the mid section
• Put the top section on, glue everything together
• Let cure for as long as necessary 
• Grind the tips of the tines so you don't stab yourself every morning 
• Enjoy.