I remember a long time ago there was some talk about trackballs with red vs green optic boards and think I remember reading something bad about one of those types, so before I buy a 2-1/4" Happ trackball from some guy on Ebay, I wanted to make sure it is not going to be a "bad" one. Perhaps the green optic boards were the bad thing? Perhaps the problem with optic boards was with "USB" trackballs only? I cannot remember and I cannot locate what I remember was the main post for this topic.
Can someone shed some light on what the problems were with the Happ trackball and the optic board color.
I have an opportunity to purchase a brand new arcade (non-USB) 2-1/4" Happ trackball through Ebay and can have my choice of one with green optic boards or red optic boards. Are there any serial numbers or revision numbers on the optic boards which I should ask for to verify they are the "good" ones? Which color should I buy (green or red)?
I need to make the purchase soon, so any help would be appreciated.