I use the Leader CV2 spouts and change them every year. They seat in the trees well and you can see the sap coming coming out of the tree. I tap in February and they still produce good in April. You do need a good tap puller like the one that CDL makes to pull them though. The cheap red ones bend too easy and a claw hammer won't do it either. You do have to cut about 3/4" off of the drop every year and you'll need to change to cup tees if you change over from stubbies.