Miniature hand holder with rotative cup

Inspired on the Redgrass RGG360 ergonomic miniature holder, I started to design just its cap to have replacements, but finally I decided to redesign the whole hand grip so I could print the whole hand holder on my own. It needs a common 608 ball bearing so you can use your finger to move the mini. It has an ergonomic design, low weight and a total hand grip height of 7cm Update 09/12/2020: Thanks for all the donations, you are awesome!!!!