This update has been a long time coming but I am happy to report that the production model is ready and I now have the necessary parts to make and sell my kill switches.
There is currently about 15 switches in use throughout Australia in planes ranging from 50-150cc sizes and with pilots from gas engine newbie's to TAS competitors and I am very proud to say that I have had no complaints so far.
I would like to say a big thanks to all the folks who volunteered to test the switches for me and to Flying Giants for providing such a great forum to share, learn and enjoy
Please PM or email if you would like more details regarding switch purchase.
And now some pics of the production model and of my switch install in my Comp-ARF 2.6m Extra 260: