A thread for the odd-ball tools you have made that did the job correctly and permanently and also those that were for a good enough fix to get to work.
I submit this example in the category of tools that got the job done correctly without needing to redo anything. Replacing my distributor, I needed to know when the cylinder number one was in top dead center on the compression stroke. Doing the screwdriver trick only tells you when the piston is at the top. Using this tool told me when I was in the compression stroke at the top. It is made out of a zip tie, the index finger from a used disposable latex glove, and the empty sleeve from a JB Weld Steel Stick container. It did not seal perfectly on top of the spark plug hole. But it sealed well enough that the glove finger would inflate a little on the compression stroke allowing me to know when I was approaching TDC. Then I would use the screwdriver method to determine precise top dead center. Car runs great. (Keeping the "tool.)
