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@Dammit
I’m just interested in how things work, and unable to accept that the answer is “you don’t need to know that”.
I will say that there is an incredible amount of misinformation and group think on motoring forums, and amongst aftermarket manufacturers, so establishing what’s actually true is also quite interesting.
There’s also (and I find this odd, coming from the perspective of being a product director for a SaaS company) a great deal of secrecy- piston skirt profile for example, which confuses me as you can buy a piston and scan it, but they won’t send you a dimensional drawing.