Audioblazer, I must say, I was shocked at how easy this arm to set up, and how quiet the Sil-Air compressor is. The hissing you mention is faint & I have only heard it twice in last few weeks. Kuzma includes about 30 metres of tubing, so you can put it just about anywhere. (I.E. Hole through floor to basement?). Do not let this noise issue discourage you. It is a non issue as far as I am concerned.
Regards.