I've moved the releases over to bintray and there are new releases.
Latest release:
https://bintray.com/simsilica/demos/mphys-demo/1.2.0F1 opens the help. Tab opens the settings panel.
The big deal now is that objects are spatially "binned" and the engine only processes the active bins. This was one of the necessary requirements that Mythruna physics will need.
As to your other comments, I won't go into detail but these settings were the ones I used when testing Mythruna objects and they will not necessarily look right with spheres. They may not look right with Mythruna object either. As per other discussion, I will always err on the side of stability. As it stands with these settings, I was able to stack objects two high... which is sort of my minimum requirement in the end. I'm ok if stacking crates more than two high doesn't work well but I'm not ok if you can't put items on a table.
Anyway, now you can tweak the settings all you like and discover why it's a difficult problem.
And in the end, tweaking it for spheres won't matter for block objects... so I will wait until I have block objects before I mess with that.
P.S.: At least one or two monkeys have shown an interest in seeing the source code... so this improves the likelihood that I will open source it... which also improves the likelihood that others will actually help fix any lingering math issues.