My memory isn't 100% intact, but if you simply reverse the order of the body_detail_plan materials you are using in a arguement from left to right, it'll generate bones on the outsides, then you can shift the position of skin etc.
[BODY_DETAIL_PLAN:VERTEBRATE_TISSUE_LAYERS:BONE:CARTILAGE:SKIN:MUSCLE:FAT]
Something like this, just check the tissue layers are correct, most outward material starts at the beginning of the arguement.
im trying this now but the game is behaving in a very weird way
[BODY_DETAIL_PLAN:VERTEBRATE_TISSUE_LAYERS:BONE:BONE:SKIN:FAT:MUSCLE:BONE:CARTILAGE]
as you can see i have to duplicate the bone token for it to actually hit the bones for some reason, otherwise it will just go to the next tissue which would be the skin. i dont know why that is but it does worry me slightly because i dont want 2 external skeletons. this is the same with the cartilage. if i put BONE and then CARTILAGE all attacks will only hit the cartilage for some reason and i dont know why
edit: the only difference that i have noticed is that every attack seems to do a lot more damage. punching a neck for example now leaves quite the mess...
edit 2: completely removing the bone token after this duplicate token issue also does not make this go away. instead all attacks now go directly to the muscle instead of the skin...
edit 3: the only way ive managed to now solve this is by doing this
[BODY_DETAIL_PLAN:VERTEBRATE_TISSUE_LAYERS:PLACEHOLDER:PLACEHOLDER:SKIN:FAT:MUSCLE:BONE:CARTILAGE]
with this method all attacks do once again go to the skin. i dont understand why this happens especially since it only started to happen after i started messing with this token. a game restart does not solve it and after this bug comes into the picture it applies to every single other creature...