Disklavier

Hey All,
       I'm glad to have heard about this group, and only being a member since 
yesterday, I hope that I can benefit from the wealth of knowledge of this 
group. My first question is this;
1) How can I turn down the acoustic piano's volume. This would be setting the 
piano to play below the factories lowest volume setting. It is way too loud. 
I can play the piano very softly. 
2) Is there a way to get my hands on the maintenance manuals so that I may 
calibrate the piano to my specifications?
3) When using the Smart Piano floppy with a commercial CD I have to turn the 
volume way up on the CD to drowned out the Acoustic piano so that there is an 
even balance between the two. I'm sure if I can solve quest. #1 then this 
would also be adjusted. 
4) Anyone out there have a Dampp-Chaser installed on their DC1A or DC2A? I 
just had one installed on mine. This tech used the typical grand setup 
although I've head of tech's using two smaller models. Any feedback here 
would be appreciated. I hope the installation method on mine was correct. 

Thank you for everyone's time in reading this lengthy email, and I hope 
everyone is having a wonderful week. 
John