Func MS-3 R2 Gaming Mouse and 1030 R2 Gaming Surface Review @HiTech Legion
 

"While Func retained all of the great ergonomics of the MS-3, the R2 tweaks the working components a bit for better overall durability and further flexibility through its software. The Func MS-3 R2 now features software upgradeable firmware, a new more precise and durable scroll wheel, and Omron switches rated for 10 million clicks."

http://www.hitechlegion.com/reviews/...surface-review