I think given the popularity and fast growth of ABRA, it deserves a place at the table. I'll add sub forums to it based on what shooter suggest..
The entire target, which is what you have posted is bigger than my computer. Not just the screen but the computer, closed. So you won't be able to post it full size. you could do as other have done and attach a file o one or two bulls that could be adjusted and you could adjust those to approximate full size.
As far as being harder than ARA or PSL I don't think it is. It's probably slightly easier but remember it was designed for Semi Auto. Heavy guns have almost taken it over at least that's what I've seen. But it is deceptive, Hitting the dot is a 10 first line a 9 and so on, Top score on a full card is 200. I can attest that's easier than a 2500 ARA card, Advantages are it's fast, fun and takes about 50-60 percent of the ammo compared to an ARA card.