I have another question, but first, let me stress again that I really don't "exactly" how much this engine has been ran. I know it's been cranked, but that's about all I can tell. Someone asked me if the piston/cylinder had a "pinch" at TDC. I understand exactly what they were asking, but I have actualy experienced very few engines that had a noticable amount of pinch straight out of the box. This engine, from what I can tell, really doesn't have any. I do know that the Tower brand engines have an enormous amount of pinch right out of the box, so much they sqeak at TDC. Since my engine really doesn't have any, is this a way to tell if the engine has had any significant run-in time on it? It does have a ton of compression. Does this tell me anything? I have noticed on several .46 FX engines that there's really no pinch, just a lot of compression.

The whole point of me starting this post is to find out of anyone can give me any hints as to what to look for to tell if the engine has has any run/break-in time on it.

Thanks,
John