I've now managed to get the insulation and the bulk of the plasterboard done.  Speaker cables run in (you can see them peaking out of the longer wall in two positions up high).  All ready for the final electrical connections to give some power to the room.

Harriet is still very concerned about the ceiling though.  She says it looks horrible - I think it's because she can see cobwebs.

Next steps - probably the sprung floor & dry-lining of the house wall.   Hopefully I'll get the stuff delivered in time for next weekend.

This is a shot looking down towards where the garage door was.  The kink in the room is so that I can still open the other garage door.

April 29th. Insulation & plasterboard done.

Looking back towards the house from where the garage door was.  The wall with the breeze block will be the wall I hang my rolls of paper and vinyl for portrait backgrounds.

Finally a shot of the longest wall.  This is the wall that will be mirrored nearly from one end to the other.  You can see where the speaker cable comes out high up the wall.  The mirrors will pretty much run the entire distance between those cables.  I'm currently shopping around for a good deal on mirrors.