Yamaha DTXpress/DTXplorer/DTXtreme

Hi,

I'm thinking about making a dtxpander circuit for a brain inputs 6 and 7, by connecting a  
trigger to the stero PCY65S's. Some time ago, Keith wrote that just a few extra 
components are necessary to do just that, but the problem is I don't know how the 3 
different signals ("rim1", "rim2", main) can run through a stereo (2 signal) cable (similarly, 
how this works for the TP65S in input 2 is a puzzle). The only option I can think of is that, 
in terms of the jack, for example main gives signal to the tip, "rim1" only gives a signal to 
the part below the tip, "rim2" gives signal to both...? But how to build a circuit for that? 
Keith? anyone?

 Btw the two circuits that I have been able to solder are for normal stereo pads. They work 
well only if I omit diode D2 from the circuit (as suggested by others) which is connected to 
a Pintech Concertcast. Also mentioned by others and working best for me is reducing R1 
to as low as possible values for increased sensitivity of the "rim pad". 

Erik Paul