Well, here is how it worked for me, however, my table is an oversize 8 with simonis 760. It is fast. Trying the 4 ball with a little right english trying to go 2 rails didn't work. In order to get the english to take I had to hit to hard and over shot the desired position leaving 1 or even 2 open shots. I finally got a pretty good result by skinning the 5 with no english and a very soft hit.
I think that in this case the difference between an 8 ft with 760 and a 9 ft with 860 is so great that there is no comparison. I'll try it on my son's 9*860 when I get a chance. It's a good little drill for speed control
Dave Nelson