I got this to work in the end. It was actually more of a bug with matching the bone in the animation I was transitioning from to the bone in the animation i was transitioning too.Along with a lot of fiddling around with making the player load an animation without immediately assigning the rotation/translations to the actual model’s bones.
Anyway if anyone is struggling to get slick animation transitions using some based on BetterSkinned working then I’m your guy.