I think all you need to do is lend a machine for 90 days & see how it goes.
The reason I mentioned Diki is he can be very critical, but I have found him to be truthful, talented, and on point.
Give the Keyboard to one of your buddies you will not get great feedback.
Choose someone tough & talented and you will make great strides.
I beleive in the potential of your keyboard greatly. In the case of a car fit & finish are paramount. Keyboards fit & finish of it's sonic capabilies count. It all has to work together. Critical advice will get you further.