This is a redone version of my first publicly shared yo-yo now designed for MR85 bearings. 

It uses different hardware, but I tried to make it as simple to build as possible with readily accessible parts. 

It requires:

• 2x m3ns or other ~5.4mm wide square nuts
• 1x m3-0.5 x 20mm grub screw
• 2x 19mm silicone yoyo pads or flowable silicone. 
• 1x MR85 bearing

Install the pads first. Then drop a square nut into the nose hole in one half, thread the grub screw in from the inside face, ad the MR85 bearing, drop the second square nut into the other half, and spin it onto the first half. Have fun.