This calls for my favorite "sheet metal screw" story! (Neil, sorry to hyjack your build) In 1982 while working for Interscope racing Fred (Ted Field, team owner, driver and a multi-multi millionaire) bought a Kremer Brothers K-4 935 Porsche, aluminum tube frame (welded together by someone that knew nothing about welding!) and it had "ground effect" tunnels that were made from about 20 ga. aluminum sheet and a million sheet metal screws! The first time we were ever going to run it was in testing at Road Atlanta. DO (Danny Ongais) took one look at all of the sheet metal screws, called the truck driver over and told him to go to town and get several hundred 10-32 screws and nylock nuts. He said he would go out and make a couple of laps to shake the sheet metal screws out and then we could go about making the fix. He was exactly right, 2-3 laps and when he came back in most of the screws were gone! We spent the next few hours drilling out the screw holes and installing the 10-32s and lock nuts. And that is just one of the many sorted stories of the K-4, never raced it, what a POS!!!
Rex