I'm excited to try 2C-B eventually. I should clarify that by physical tension I mostly meant actual chest discomfort but maybe that was anxiety related? Not sure as I'm not to familiar with mesc. I definitely can have a hard time relaxing on LSD, but even although I'm often quite stimulated, I can still do precise physical tasks quite wellInteresting. I find mescaline more stimulating but at the same time more (paradoxically) relaxing and less impairing. In my case very low doses of LSD often result in more tension than higher ones because I unwillingly resist them more.
I used to get very high amounts of tension from 2C-B until my first MDMA experience. Something clicked there and from then on it seems I've learned to relax on stimulant psychedelics.