Steve Cramer wrote:
Does anyone remember the Tribalance kayak? I seem to recall it was
designed by John Winters.

The fact that almost no one remembers it should tell you something.

It also occurs to me that Elliott's invention might be just the thing
for getting handicapped paddlers out on the water.

You're giving him too much credit. It's not an "invention", it's merely
another take on an old idea, evidently from another non-paddler looking
to "improve" the kayak. What these "inventors" are forgetting - or just
don't get - is that KAYAK ARE DESIGNED THE WAY THEY ARE FOR A REASON
and the design doesn't need their "improvements".

As for adaptive paddling, you're correct. It's about the only real use
for such devices, but that's not how people try to market them. If he
had promoted his device as an adaptive paddling aid rather than as a way
to "fix" something that isn't broken, I'll bet he would have gotten
favorable responses.