No need to apologize, that was great! And way better reply than "?" Exactly what I was looking for, now if I can get some confirmation on your theories I will sleep better I am pretty sure the 45 degree angle test would be easily passed by my S7, I don't think it would ever rotate the piston past TDC using its own weight. I don not really feel a pinch without the plug in but compression seems fine based on your info. Maybe she's in the "sweet spot".