Yamaha DTXpress/DTXplorer/DTXtreme

Hello everybody,

I was offered a d-drum snarepad. The guy wants to sell it because it 
doesn't work well with his Roland TD-6 (especially the rolls don't 
come out as they should). Does anybody know how it works with a 
dtxpress 1? And does anybody know if the d-drum snare is a dual zone 
(2 piezos) or a stereo pad (1 piezo, 1 condensator)?

Thanks,

Anko