Today #diy replaced another switch + #repaired the shell with baking soda and super glue. Next time I’ll use Japanese Omron switches :) #Logitech #trackman #marble is my pointing device for last 20 years. Introduced with PS/2 in 2002, later revised for USB + 4-buttons and discontinued in ~2022. On amazon a new-old-stock from Logitech sells for $209!!! On ebay new one sells for $150 and used for $45. I have three units. My daily driver already had 2 switches replaced and another 1 switch.