Can' t help you with question 1. For question 2 you can go to the web site I will list below and you can do it yourself. It is really easy and he gives very clear step by step instructions that you can follow online or print off. I was amazed how easy it was to do. Plus it let you learn the ins and out of your own gun. Well good luck in what ever you decide.

http://www.bellmtcs.com/store/index.php?category_id=1