That's interesting. I'd conjectured briefly (and promptly forgot) about whether the direction of rotating the retention plug made a difference in spring tension. I think I'll check my P-11.I found out why the trigger was so heavy. There is two ways to install the hammer spring. One way over clocks it (about 1 1/4 revolution from no stress to where it needs to be) and puts more tension on it and the other way clocks it about 3/4 revolution from no stress to where it needs to be. Fixed that made a world of a diffrence but still want to play with the trigger on it.