Webasto Sunroof Removal Instructions?

[Eckersmg@aol.com]

I have a 1969 MGB GT with a slide back style roof that I believe is a 
Webasto.  Two questions 1)I am having the car painted and want to know how to 
remove the roof.  Does anyone have a diagram of the mechanics of the roof, or 
can supply removal instructions and tips for getting it back together?  2)The 
roof rattles a bit and I think that some pieces may be missing, I have 
e-mailed Webasto but wonder if anyone knows of where else I may find parts 
for this style roof?

TYIA
Charles