There seems to be some obfuscation going on, intentional or not.
I have never spoken about repairing furniture with PVA or RTV, and
in rebuilding some piano parts I have sometimes used hot glue.
However, I note that a friend of mine who produces famous bespoke
modern furniture such as desks costing between £40K and £60K rarely
uses any hot glue but appropriate and superior modern adhesives.

But that was not the point -- I was speaking throughout about
re-covering pneumatics, in which PVA gives undoubtedly superior and
longer-lasting results but causes no future rebuilding problems, and
about the surest method of sticking striker pneumatics to decks --
again reversibly using my method.

I would certainly never stick any pneumatics onto decks using PVA
and from the earliest days have never even attempted to!  Even without
trying it's obvious that PVA gives the wrong kind of bond for this and
I'm surprised that Ralph Nielsen ever used it.  Not that hot glue is
any better, even with interleaves.  I have seen so many cracked boards
and split decks that I wouldn't dream of using it for this either.  And
I hate to think of the number of frustrated and disappointed rebuilders
who've failed repeatedly to achieve airtight joints first time.

One of the great advantages of using RTV as I've described is that
clamping is totally unnecessary to achieve a perfect air-tight joint,
yet the striker pneumatic can be shimmied into exactly the right
position for several minutes if necessary and stays exactly where left.
And if RTV is used correctly the pneumatic to deck height will be no
different from original.  Providing a stack is airtight in all the
right places and set up correctly it should do what's asked of it.

To hear what properly rebuilt reproducing pianos are capable of
I offer a couple of recordings of pianos rebuilt using PVA and RTV
where appropriate:  http://www.pianolist.org/music/lark.mp3 
and  http://www.pianolist.org/music/staccato.mp3 

Patrick Handscombe
Wivenhoe, Essex, UK