Internal combustion engine configuration models.
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Previously:
https://www.homemadetools.net/forum/...174#post191781
https://www.homemadetools.net/forum/...782#post159838
https://www.homemadetools.net/forum/...022#post187439
https://www.homemadetools.net/forum/...760#post159742
https://www.homemadetools.net/forum/...329#post173131
