Nice work. I had similar cooling issues with my 22" radiator so I made one for it to see if it made any difference in the engine temp. It didn't. I have an 18" fan, so I couldn't keep the hole inside the core size. I've since installed a new Champion 26" and plan to build another one from bare stock this time. The finger brake I used kind of mangled the .040 aluminum I used, so the next one will be .063".