That makes sense to me and is what I thought, but I seem to have seen several references here and elsewhere that narrow Diamond pockets are made even harder by the straight sides.
My table has 5" openings but are only 4 1/8" at the back. They rattle a lot of balls out and it is very frustrating. To make it worse, the pocket shelves are 1 7/8" deep, with very little roll-off at the shelf edge. I can place a ball right at the shelf edge and the entire ball will be completely inside of the points.
Also, the pocket leathers themselves have hard points that are a ridiculously narrow 3 7/8" across. Hit one of those on the way in and the ball spits right back out. I'm bad enough as it is without having to miss well-hit shots all the time.
I'm thinking of having the table worked on by a better mechanic. Any suggestions you might make?
Maybe I should post this on the "Ask a Mechanic" forum as well.