The wall hanging is finished! After just over 4 months of work.
The whole thing was put onto blue wool background to make it easier to hang. Blue back lining for extra firmness and thickness, since it’s supposed to deaden sound in reception. It’s attached to the wall with a strip of Velcro at the top on the back and stick on velcro on a batten fixed to the wall. We wait to see if it’s still up next week or a mess on the floor!