I'm aware of this gentleman's test. I'm also aware there are some serious flaws with his design of experiment and that everything should be taken with a grain of salt. First off in the article he explains

" I didn’t use a standard tension test geometry because it’s harder to print in a standing position and I already noticed quite some scatter in the past, maybe because my test machine allows for some misalignment, which is not so bad for the test hook because it aligns itself. "

He's also using an uncalibrated home built tensile frame. I don't see where he's recorded the humidity or the temperature of the test, no do i see the moisture analysis of his filament before printing. Dimensional analysis of his hooks for consistency or a significant sample size.

A standard test does exist for tensile testing of plastics, ASTM D638.

Listen, i appreciate when people take on tests like this, I think it's good to get some interesting initial data, but this by no means takes into account the broad range of variables within, and without control. This is not publishable data. Is it indicative that higher density (with few voids) yields a higher strength: to some degree yes. To what degree, this test cannot say.

To your gatekeeping comment about me having " no business printing firearms and even less in giving incorrect advice as if you know what your talking about", you don't know anything about me. I work with FDM/FFF prints every day at work. I have an engineering degree. This is what I do for a living. So if you're going to appeal to authority with your argument because you've made a few glock frames then that's really poor stance. You don't have to be so condescending to people you know nothing about.

Will my frame hold up? I'm very confident that it will. Could it be improved upon? Yes. I will likely just for aesthetics, print another frame since it's not a significant cost or time investment. I was just excited to test fit this all together and share it. Apparently that's not allowed.

Wrapped up, my claim originally was layer height does play a part in strength, but there are other factors that are important too. I still stand by that.