|The first step is to create
a tiny divot in the center of they nylon retainer so the bit won't drift.
Using a center punch will push the nylon retainer down onto the ball valve,
so be sure you're willing to commit to the process before hand. Alternately
if you have a very steady hand you can center the bit itself and twist
it backwards. This will create a small dent to guide the bit but will probably
also push the nylon retainer down.
Apply a little pressure and
begin twisting slowly. You'll see small curly Q's of nylon develop if the
bit is doing it's job. Be sure to have the bit aimed straight into the
nylon retainer. You don't want an angled hole. As always, take your time!
You only need a hole about 1/8"
deep or so. Check your depth several times. Go too deep and you might mar
the ball valve itself .