I am sure you could however, the inside has a ridge that doesn't allow the jigsaw to lay flat. We found it easiest (for us) to keep the saw flat against the outside skin reducing vibration and possible bending (or operator errors 🤔). This is also the same technique we used for the rear windows where we had to cut bracing that wouldn't allow us to "follow" the original opening. - Great question! Thanks
Why not just cut it from the inside?
I am sure you could however, the inside has a ridge that doesn't allow the jigsaw to lay flat. We found it easiest (for us) to keep the saw flat against the outside skin reducing vibration and possible bending (or operator errors 🤔). This is also the same technique we used for the rear windows where we had to cut bracing that wouldn't allow us to "follow" the original opening. - Great question! Thanks