I may have a trackball problem... I just want them bigger!!! blue trackball is a 34mm for size reference. yes it will be working, the last largest one i made was 60mm,
Billiard Ball Finds A New Home In Custom Trackball Mouse | Hackaday
Billiard Ball Trackball Mouse Is Perfect for Gigantic Hands - Hackster.io
Kensington Expert Mouse - Wireless Ergonomic TrackBall Mouse for PC, Mac and Windows with Ambidextrous Design, Optical Tracking, Scroll Ring & 55 mm Ball – Red (K72359WW) : Amazon.co.uk: Computers & Accessories