I'm starting to think that Yamaha isn't going to reply to my question. I haven't even got their standard reply saying that they recieved my request and someone will be contacting me... It seems like Yamaha only likes to answer questions that involve them entirely.. I bet if I said I wanted to hook up a "Yamaha" drum machine to my PSR, I would have at least got the standard reply that they recieved my question... Honestly if they do reply and tell me I cannot connect the two, this will be the last Yamaha keyboard I buy. These drum kits are just getting WAY too old for me.. There's no room for expansion or the option to even edit them. I've had several of their keyboards (even a top line synth) and I think it's time for a change when I get another one. I'd love to have the PA-60, but that's WAY out of my price range..... Maybe when my daughter goes off to college That'll be in about 18 years from now..