Making a half a dozen or so special keyboards with chord sequencers for the interested people on this site, hardly seems profitable.

Then again, you may know something the manufacturers do not.

Using the philosophy,"if something doesn't move, use a bigger hammer", will hardly work in this case, considering the lack of interest shown so far.

I commend you on your diligent, but rather futile, quest.

Perhaps your persistance will pay off, and some independent company will make a chord sequencer module,(like some of the gizmos Anantek used to make) that can be retrofitted to an existing or new arranger of the individual's choice(Roland, Yamaha, Korg, or whatever).

In any case, good luck with your petition.

All the best,

Ian