I purchased an alternate static port valve which is much smaller than the one I was previously intending to use. The valve has #10-32 threads ( 3/16" X 32 threads per inch ), so I needed a #10-32 thread to 1/4" push on connector. I could not find any in Australia, however I finally found some on the internet somewhere in China. So I took a "punt" and ordered three on line and they arrived today. ( about $18 Australian delivered to our door ) They fit perfectly in the alternate static valve, which will make installation much easier. Not sure where I will install the valve ( definitely not on the dash ), maybe beside the ELT switch on the side of the centre console near pilots right leg. Alt-Air is a legal requirement of night VMC, in over four decades of flying I have never seen or heard of anyone turning it on. ( not planning to fly at night anyway ).