Many thanks for the feedback guy's
Alan's right, he's spotted that I'm using human face muscle anatomy as reference & pulled the deliberate mistake :thumbsup
I was actually expecting some negativity due to this not being screen accurate but I'm extremely pleased with the responses to this as I like the way this is looking
I'll still make the lips & chin extension as before but they can be used in combination with prophylactics rather that struggling to produce accurate tendons as it's just not working.
I was just throwing this together to see what happened using images from the net showing the Human face muscles & I'm seriously thinking about continuing with this & having it as an option... it just seems to work
Anyhoo, I've made the alteration, hollowed it out behind & tweaked a few other area's: