I ordered five sheets of 18mm MDF on Wednesday but unfortunately TP couldn't deliver until the following Tuesday :-( I was thinking that I would be making a start on the silencers for the ventilation system. As it turned out I had enough jobs to do so it was probably for the best anyway and it gave me time to think a bit more about the layout of the ducting.
In the end I finished off the cabling and added some more timber to the stud work - read on...
I changed the installation boxes for the 2-gang sockets in the 'airlock' - the originals were way to shallow and with two lots of 2.5mm T&E it was way too difficult to screw back. Anyway these were replaced with 47mm deep boxes and all good now! I then added an installation box for the fan controller so that it is now recess mounted into the wall as with the isolator switch. Next job: run the CAT5e cable through the stud work to where the PC is to be located; along a joist and down the stud timbers. This was fed into a 1-gang installation box and terminated into a recess mounted socket panel. I added another length of CAT5e which was connected to the second socket on the panel. This was fed to to floor level where it will eventually run in floor providing a socket near the desk for laptop or for a spare if I need it.
The stud work required a few additional uprights in corners within the bass trap alcoves and where the internal stud-wall reaches the side walls. This ensures that I have a good solid edge to screw the plasterboard in the corners. The corner pieces were made from full size 4x2" rotated 90 degrees and for the rest I cut length ways the 4x2" to 2x2" using the circular saw. I used off-cuts from the main build for this, simply cutting each length to fit tightly between the noggings. These were then screwed to both the uprights and the noggings. I can officially say that the stud-work is now complete!!