Yes! like you said, just use longer screws. Standard screw size is 3/4 inch - pretty sure that is the size of the screws you would have used to put your Reptibreeze together. Next screw size up would be 1”. Get stainless screws because you don’t want them to rust! When you’re assembling your cage, line up your coroplast panels with the screw holes on each side of the frame. Coroplast is really easy to poke through with a screw just using your hand. Push the screws through one hole at a time to make sure they go right into the holes when you start screwing them in.
i also invested in one of these bad boys and it came in EXTREMELY handy when I put my Tamura cages together
Electric Screwdriver
Here are the pre-cut 48” x 24” coroplast sheets I bought. They come in a pack of 3 and are all the same size.
Coroplast Sheets
Last edit: When Beau got coccidia and I had to nuke everything in his cage, I used these same coroplast sheets to replace the window film i originally out on his Reptibreeze. My cage was already assembled. I tried to screw the coroplast into the frame using self-tapping screws, but I just didn’t have the strength to get them to pop through the aluminum frame. I wound up duct taping the coroplast sheets to each side of the cage except for the front. It looked uglier than sin but it did work

you can actually see the cage with the coroplast taped on behind Bastion in the pic.