Emu XL-7 & MP-7 User's Group

Hi all,
Just got my hands on a waldorf pulse that i had to repair.
Ment to be getting together with some friends on monday to have a mess 
about but dont want to take a mixer with me..
So i can send the pulse into the XL7 via both sub 2 jacks if i come in 
on the 'ring' of the jack. That all works fine.
Can i adjust the level that gets mixed back into the main L+R buss from 
the return of the sub jacks from inside the XL7? 
Normally i guess the trick would be to back off the output level of the 
pulse say, but each preset has its own master level stored, so if i 
change preset the level goes through the roof.. bit dangerous, 
especially as it will be going into the PA. Theres no global master 
output level!
Couldnt find any referance with a quick scan of the manual. seems that 
the 'normal' way when using the internal synth is to us the channel 
volume or back it off in the preset menu, but this would only adjust 
the send level.
Any idears?
Cheers
Gonz