Hi,  I really hate to say this, but not to have said it would be
worse.  There are technicians out there who that steadfastly believe
that _any_ piano that has a pneumatic system installed in it is
not "worthy" to be maintained, at least by them or anyone who is
a "serious" piano practitioner.  They're just piano snobs, in my
opinion.

I knew a few pianists that had the same opinion.  I can say this
as I have encountered several of them over the years.  I sincerely
hope this ideology is on its' way out!

Bob Hodge