This is the way that I find comfortable; I use my middle finger for the number 8 and 9 and I use my ring finger for the number 0 and - (dash).
The program that I downloaded free from the internet that taught me some of these moves was called 'Senselang'.
I have noticed that the fingering diagram under your website and other websites teaches me in a different way on how to type numbers.
I find it very slow, and awkward typing numbers, the way your diagram suggests. It puts a lot of strain on my right hand.
Shai, I would like to hear what you have to say on this topic?