Since you mention the elbows: I think their joint orientations are, umm, suboptimal. The positions, too, possibly, I'm not sure. I've been meaning to go through the joints at elbows, hands and feet at some point and tweaking the settings to fix some issues I saw. So, it's probably a good idea if before you spend a lot of time on JCMs for a joint, you have a look at the settings first and see if adjusting them would make things easier. If that's the case, I'm more than happy to include your changes into a future Antonia update if you let me have them.

As a further heads up, my weight-mapping plans are on ice now. I'll see how things look in Poser 13 first before investing in any big updates. So, no worries about creating JCMs that are incompatible with upcoming WMs etc.

-- I'm not mad at you, just Westphalian.