Should any UK readers want to try this out, I still have a few adapters
left at 4 GB pounds each (plus shipping).  These are conical lumps of
rubber with a hole through the middle.  The "base" of the cone is
shaped to fit the tracker bar, and the tapered cone should fit most
vacuum cleaner tubes.

I inherited these items when I took over the business from Nigel Perry,
but I believe they were originally designed and produced by Steve Cox
(sadly, no longer with us) who started the business.  I don't have a
mould, so won't be making any more.  I also sell traditional tracker
bars pumps for the purists.

John Farmer, UK
john@musicanic.com.geentroep [delete ".geentroep" to reply]
http://www.musicanic.com/