Yamaha DTXpress/DTXplorer/DTXtreme

Hi,

I know this has probably been mentioned on here before but can anyone 
provide me with some schematics and instructions to build a dual 
trigger switch to replace my TP80S.  I am looking at making a DIY mesh 
head snare.

I am an electronics novice so I'll need some foolproof instructions.

Thanks in advance.

Mr F