Post WWII Highalnd Coatee

In my three CDs on Scottish & Irish uniforms around the Empire and Commonwealth I have incorrectly drawn the back of the Highland coatee.
It has rear buttons and skirts as shown in the attached illustration of a Corporal's jacket.
The piping of the cuffs and flaps, and the shoulder straps differed between countries and units.

https://i.servimg.com/u/f42/12/22/09/10/110.gif