Hi Trident,
works very well actually. I remember the subject cropped up a few months back, we weren't sure if a usb numeric key pad would work.
It was sheer luck I happened to be browsing ebay. I thought that for a mere $17 it was worth a try. Just have to come up with a safe way to attach it to the piano that won't do damage to it the veneer.
Then I'll get some colored stickers & work out what functions I want to assign to the keys.

Haven't spotted Frank recently. i think he was interest in the subject also.

best wishes
Rikki