Not sure what compelled me to take on a kit-bash the Estes Prowler PSII E2X for my next build, but the body tube and nose cone seem to be close enough for a 2X upscale clone of the Centuri Screaming Eagle. I just finished a 1X clone with SEMROC/eRockets parts and a 3D printed fin can, and it seems like it needs a big brother. I was thinking about a 1.33x (24/18 ratio) upscale for a 24mm power, but with the Prowler kit I just got on sale, to me it just looks like Screaming Eagle kit-bash material. First obvious modification is converting the 3-slotted body tube into a 4-slotted body tube. I laminated some cardstock strips to fill in the slots on two of the existing slots, and glued that to a strip of regular copy paper. Will fill and primer over these to hide the seams later. With these two slots filled, the centering rings still have enough tolerance to slide in over the copy paper strips on the inside of the tube. I plan to extend the length of the slots since I will have a longer fin root than the stock fins also. The Prowler kit is really a cool design in itself, I might have to buy another one to build it stock.