I agree completely...I have yet to see a home made double manual rig that is as slick as the integrated keyboards.

The location of the pitch and mod wheels would be only one of the issues I'd have, as well as the style variation buttons and registration memories being more awkward.

The manuals should be as close as the keyboards are on a Nord C1/2 or a Hammond B-3.

The registration memories/style controls could be positioned between the manuals.

Removing the amps and speakers from a P-85 and PSR-S910 would take at least 5 lbs off each instrument...total weight about 40 lbs, and I'm sure more weight reduction could be found.

If I had a dual manual instrument of decent weight and dimensions, again, about the size and weight of the Nord C1, why would I want to use only one manual, when two are now as portable as one?

A target price of under $4000 seems very reasonable as well.

Think of it...most pros use two keyboards...a weighted action 76/88 note for the bottom, and a 61 note synth action for the top....having them in one case would be pretty cool.

Ian