Tempest spills some of his secrets on bone modding.
Awecolored’s Bone Settings. More great links below!
HS_Active_Bone_Modifier will let you alter the chara on the fly in HoneySelect. It uses the *.png.bonemod.txt Files. Just extract it where you want. It doesn’t have to be in the HoneySelect root.
Check out this Easy How to Video for all the basics! A great channel to subscribe to and all these modding videos are recent and up to date.
Also here’s some info on LLBeanie’s Bones. And IAmSlacker’s Thigh Gap Settings.