The 930t with surface is just too much ball!  You have used it on a dry house shot and on the Shark pattern, which is long but also has only a light volume of oil inside of the 2nd arrow.  Therefore, anything strong, especially with a super rough 500 abralon surface on it, will begin to read the lane far too early.  The result?  It doesn't retain enough energy to pick up a roll in the midlane and hook on the backend.  You most likely need to use a much smoother surface like 4000 abralon, or perhaps even polish the 930t, and use it only when there is a sufficient volume of oil to get it through the first 30 feet of the lane.  And be sure you chase the head oil inside as the shot starts to break down.  It might seem counterintuitive to move left when your ball stops turning the corner, but with strong coverstock pieces that need oil to get down the lane, you will see less overall hook if it starts puking in the fronts.  And remember, on a drier shot, just don't use it!  That's why you have the 505a to begin with.