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Hello all not long on here but have a few ideas i think we can all benefit from ! , Im looking at building a digital compression tester for the rotary's as it seems there is a lack of them around (price availability etc..) and it seems to me that it could be a useful tool for a rotary owner i.e. should be the equivalent of a socket set and wd40 it would comprise of a pressure sensor that screws into the spark plug hole which will then connect into a small box of mysteries and then finally to a laptop or pc .. to be graphed on screen so the peaks and troff's can be viewed etc and then with some maths calculate the rpm etc by the looks of it they would cost anywhere between 80-150 euro (still have to sort parts etc etc ) just wondering if there would be much need for a "cheapish" compression tester made available to the community, I would love to hear your thoughts and opinions on this ?