I like to fold my index cards into 1/3s and also staple some needles into the bud cap. It provides a nice stiff and meaty bud cap that wont come off. Avoid catching the leader. I can put a couple hundred bud caps on in a morning. I even like to bud cap some of my caged trees cause the heavy snow can bend them over plenty easy.
I ordered some browse blockers to try on my white cedar. The mild winter kept the deer on my land last year and they reached over the cages and browsed my cedar. Never tried browse blocker, but I have spent $100 on worse things.
www.browseblocker.com