Yes, the RP-1000 ep's are great, I just can't get on with the main piano sounds.
I bought it only just recently off the back of an Elton John concert I saw years ago, but sadly it just hasn't come up to expectations and has to go, but for the time being it'll have to do!
I've got the old Yamaha CP70 sitting here - faithful as ever, but it's non midi and just a tad too heavy to cart around nowadays!
If I could find something similar to that with midi and weighted keys I'd be happy.
My main gripe with the RD is that no matter how gently you depress the keys, the notes just 'switch in' about halfway through their travel, albeit at the lowest velocity, still annoying... perhaps they're all like that???
Anyway, regarding the sustain thing....
I haven't explored the midi side of the RD at all as I have no manual, but will see what I can find tomorrow (playing tonight, so have to leave shortly - UK time).
Thanks again for your help, will let you know how I get on.