Hi DataBlues: Thanks for sharing your detailed PSR2000 observations with us. Looks like you indeed found some legitimate bugs (though I haven't checked them out on my 2000 yet). I do hope that the mulitple efx issue you mentioned is only a bug, and that multiple efx are indeed supported for one specific panel voice (main, left, layer). I also think that BOTH your suggestions and questions are good ones. I hope Yamaha or someone here can provide answers for us. Oh yeah, and THANKS for the great hints
I hope to find some time today to futher explore the PSR2000 too and will provide continuing reports here as well.