Yeah, we know… ‘Fitted’ does not necessarily mean it fits. But, Astrid Kaufmat has an interesting post in the forum about the problem. She is on about figuring out how to work with the SL avatar in 3DMax/Blender/Maya modeling programs without having to have a plugin. Well… good luck with that. I finally gave up, bought AvaStar, and started having fun.
She goes into great detail about the problem. But I’m pretty sure she hasn’t figured it out. She certainly seems to have missed the problem some of us have recognized. Explained here: Second Life Shape Export.
Astrid has been around since 2011. But, she seems to have missed the discussions on the ‘deformer’ and the problems with changing the system avatar. She goes on to recommend a new avatar for SL. I believe that is a losing battle.