Quote Originally Posted by LaserDad View Post
I did my towers a few years ago, and used a hole saw. Now that I have a plasma cutter, I would highly recommend it, instead.

Definitely tape and cover the entire engine compartment, before drilling. You will never be able to get rid of some of the filings, and they will rust.
I think the holesaw makes a very clean hole, even if it is messy while you're doing it. The strut towers on my wagon were cut with a plasma cutter and they look horrendous. I want to fix it some day, but I'm not sure how to go about doing it.