obclassicut...Just as I posted in your other thread, it is always more accurate shooting on the vertical axis, because "accurate" prediction of CB squirt will vary greatly, depending on speed and distance to the OB. In the spot example, I would never play the shot with sidespin, unless I needed it for position. My answer to your second question would be no! 
Scott Lee
http://poolknowledge.com

Scott Lee
http://poolknowledge.com
Can you be more accurate predicting squirt and hitting off from the vertical axis or shooting centerball and hoping no squirt takes place?
If you had to make 90 of 100 spot shots that were a 30 degree cut for a million dollars would you shoot any of them with english?