It's not terrible to do. I would remove it and create a cardboard template that you can transfer onto the actual firewall

Awesome, thanks for the reply! I’m almost to the cage stage of my build. I’ve been dreading it, but this video gives me hope I can tackle it myself. I’m now subscribed, looking forward to seeing updates on the car!

I appreciate the sub! In a month or so we will have plenty of content to post with the season starting. The team z cage definitely makes it easy just take your time, fit everything before your completely weld out a cage joint, and the cleaner the metal the better it will turn out.