Update :-
The HT room almost fully completed, only 2 outstanding jobs.
1) Get & fit plugs to the holes in the wall that were drilled to apply the termite killing chemical.
2) Fit the lower louvre to hide the aircon unit. It has already been made once & went back to have a fly mesh window fitted so I could use the aircon remote. Unfortunately the company disappeared along with my louvre losing P7K. I have just had another company measure up & waiting for the quote.
In the mean time the diffusers have been completed & hung. I have made them a geometric shape (semicircular) but to work properly they should have been deeper. As the the sound was quite good without them I went more for aesthetics, they will do something to the acoustics so still at the experimental stage. I have done the 1st calibration & to be honest I prefer the sound before I calibrated so I have a little more experimenting to do.
A few pics below.
Rear.
Left side rear.
Left side front.
Right side rear.
Right side front.