Hi Diki
I am a little confused with your last post, (Drums in a cavern) as I thought what you required was to be able to adjust the Global Settings without altering the preset settings, and which can be done on the Wersi.
Your last post however seemed to indicate that your requirement was to be able to alter the reverb on the sounds and not the styles or drums, (Which can also be done on the Wersi, as the styles, sequencer and sounds can be adjusted independently) for this reason I think we may be talking about different things, so could you elaborate more on your requirements.
Regards

Bill