After quite some weeks of back problems and general inactivity, I finally managed to finish the twins!
Here's the baseplate mirrors that I've waited for for so long:
Here in place in the recession:
The Sonosub in the usual "cannon-position", while the base plate is screwed on:
(The "cannon-position" is when the sub is gently laid across a whold package of Rockwool with one end higher than the other, so that I can work on it. It's the only way to handle the beast singlehandedly...)
Here with both mirrors in place:
(try to imagine them without
the dust & dirt from the basement environment
Unfortunately there is a gap of about 2-3mm between the mirror and the recession wall. It's quite visible with a strong back light like below, but in normal light conditions (like in the cannon picture above) it looks alright:
(maybe I'll fill the gap with black silicon later on. We'll see...)
And here (after about 5 months of work - between family life and house refurbishing)The TC-2000 Sonosubs finally finished
I want to thank all of you that have bothered to follow this thread. Thank you so much for your insight, help and moral support!