Hi
All the mods have now been installed after some assistance from AudioCom. I am happy with the sound but it is very difficult to be certain of any improvements as I have to rely on my audio "memory" of what the initial sound was....

My impression is that the sound is smoother and soundstaging more precise. I like what I am hearing but the initial sound was pretty good too. Whether the mods have been worthwhile is difficult to assess objectively - I will have to try to get a friends standard Transporter to compare it to which may happen sometime on the future.
I can however say that the installation was difficult mainly due to the lack of detailed instructions. I am a novice when it comes to this type of installation and had to use an experienced audio repairer.
Jose