The best tip is to have available a dental pick, and to do the work within a transparent plastic bag. There are a couple of very small parts (spring and detent for the windage adjustment screw) that can attain a quite high velocity when traveling across one's kitchen! (Don't ask me how I know?) If your going the contact Brownell's for that tool, you might want to get a spare set of the parts I just mentioned, they're very inexpensive JIC? Also, a jewelers screw driver can be used to do the staking of the new adjustment screw with. I was nervous as a cat in a rocking chair factory on my first one. Use your head, and their bark will be worse than their bite.