Nice video! These two balls are a great 1-2 punch, in my opinion. The solid Envy is pretty strong (mine is drilled pin under the ring with hole on VAL below my PAP) and I am able to use on most patterns except the very slick and very dry. The Stinger (mine is pin above the bridge with no hole) can be used to open up the lane a bit when they get dry - I have not used it on a really dry pattern but I think it would be ok. Definitely recommend both of these to anyone looking to try a LM ball.
