Hey yyzkid,
I had a Poly 800 too. It was pretty cool, or at least I thought it was. Until the volume knob started actting up. Every once in a while out of nowhere the volume would just drop, then a tap on the volume button got me right back. This was the pits in the middle of a song. It began to happen more and more, then I started borrowign a friends DX7!!!! Whoa! That was awesome.

Peace
<><
Bob