That is one nice pedal unit - £20 in UK (US$30.24) Usual UK ripoff
The polarity switch is a great idea too! That would be the one Ray if you can find one in Oz.......
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Willum

After silence, that which comes nearest to expressing the inexpressible is Music.
Aldous Huxley
( especially when the music is played on a KN7000....)