I put a pro zone azure 2 X 4 and it was beautiful.
As above, early read smooth break.
Lovely on wet heads fresh overreading backs.
Different from a 4 X 2 with weighthole on pap.
Tends to be pretty straight thru heads!
Also I've also used a 2 X 2 but I could not get them to hit on normal league UNLESS I put a weighthole 2 inches past the PAP.
REgards,
Luckylefty