WOW, a version 4 carto punch! Now that's funny right there.
Sorry for having a little fun at your expence, but how far are vendors and manufacturers going to take this 'revision' 'version' BS. Wonder what revision my drip tips are.
I paid $6.75 for my saddle valve about a year ago, and it still punches cartos just fine. How much do the V4 carto punches cost?