All the home made tools I have were to fix the 4 letter "F" words except one. I had to extend a 10mm socket to fit over a stud on a 85 Chevy S10 2.8L valve cover. My F word repairs required me to grind down a 1/4 in socket to get the ignition module out, cut a set of spanner wrenches out of flat stock to get the fan off, lengthened 9/16 socket with pipe and a nut (don't remember why), shortened a 11/16 wrench to get starter bolts off a IH 345ci truck motor, M-16 rifle cleaning rods to work as oil primer for GM V8's. I am sure many more that I forgot.