With regards to the fabrication of the clock relocation bracket for the 2005-2006 Legacy GT cars; I have discussed it here:
My alternative to the $ 200 relocation kit: peer critique plz. - Subaru Legacy Forums
Simply put it; I found the 200 dollar AVO bracket to be too expensive to be worth it. It depends from person to person but to me; my end result (UNPAINTED as of 15 Jan 2007) is acceptable.
With regards to the screen, the cubby on our cars is 6.5 inches long and the space between the HVAC ducts is something like 7 inches. The Xenarc monitor is something like 7.3 inches long so I ended up cutting the monitor's edges and upper corners to make it fit. This is the solution adopted by Prelude (see the MP3car link) but Sebbery decided to mount just the screen and the circuit board - fabricating a new bezel by himself. This way one does not cut thru the housing of the monitor. Regardless; the warranty on my 400 dollar Xenarc touchscreen lasted about 4 hours.
I must mention at this time that there are a number of other monitors such as Lilliput that are much cheaper but perhaps not as good as well as several in-dash monitors such as the Xenarc 700 IDT which is a mechanical flip-out screen - similar to most aftermarket navi screens. Unfortunately, the housing is about 8 inches long and there are plenty of hurdles in making that fit inside our dash. You may read at your leisure about it on the www.mp3car.com
website. There are a few other in dash monitors available both 1 DIN and 2 DIN but for any in dash solution you will need the AVI 1 DIN/2DIN kit and will end up cutting in the dashboard. For some people it worked great using other "bulky" units (fweasel)...others like me were discouraged.