Somehow, I find it oddly comforting that I can
find here on BF guys who will defend the Delta
brake.

My question to you would probably be along the
lines of: "From a purely practical design standpoint,
do they work so much better than what was available
in contemporaneous brake hardware as to justify their
production? Alternately, I can understand designing
and prototyping something like this, but don't you
have to justify the astronomical costs of production
and problems with setup and maintenance before
you actually foist these off on an impressionable
buying public?"

Which is pretty much rhetorical at this point, because
I can hear the echoing no, no, no ... from here.

With much love,
Mike Larmer