I had to order more plastic, go figure right, it will be arriving middle of the week so hopefully I will have started by the weekend, look forward to a real update soon!
Let night I had some time to start working on the tower vents.
first I drew everything out to fit in the opening.
Then I tried to start by punching out the radius ends with a punch tool but as you can see that didn't work out, my blan B will be to file the radius in. Fingers crossed that works.