Jaager, if you build a "JNT" file with the same number of parts as the target figure it works perfectly. I saved some CR2's with the "JNT" poses and then examined the CR2 VERY carefully. It looked exactly as if it had been done the right (hard) way. So technically, no it wont go boom if the figure has the extra hidden body part. The boom happens when the JNT file has extra parts. Then it fries the loaded figure, and makes Poser weird until it is restarted. I don't think I'm going to find a way around this so If CaMie (Maybe I should call her ERiCa since we've renamed this technology) ever gets released it will be with one of the longest readme files in history. I'll probably password the zip and make people actually read the readme to get the password. There will need to be a pose file for every common combination of hip/ ab/ chest/ collar/ shldr/ foreArm/ hand/ neck/ head... Yikes I'm not sure it's worth it. Then there are weird figures like my Taarna shoulder pad, I only has one side. I was really hoping there was one line in the otherpart_jount(xyz) cahnnels that was causing the trouble, but I think it is the presence of the channel in general. So are we calling them "Joint" files? An asside, I've found that the order that certain things appear in a Poser file can effect how things work. Example... I wanted to add an extra part to an existing conforming figure. The trouble was Poser kept trying to make the flaps I added conform when it shouldn't. I discovered that the extra part needed to go last in the weld and add child lines, then Poser would leave it alone. To address this problem, I tried moving the other_joint(xyz) lines later in the channels, fried the file. The order the channels appear seems to matter.