I found this Zenith hanging strap at Bunnings (http://www.bunnings.com.au/zenith-450mm-40kg-surehook-zinc-plated-hanging-strap_p3950180), which looks like a very cheap and effective way to create a secure bungy attachment point at the very top of the SDC shaft. No mods to the detector are necessary and the strap does not interfere with folding up the detector.
I've seen the attachment from the Pro-Swing 45 advertised for this purpose recently, but that is bulkier and so needs to be moved each time you fully collapse the detector. It is also much more expensive if you have to buy the Pro-Swing service pack to get one ($40+) and it's less strong than the Zenith, which is rated to support a 40kg load!
The hanging strap comes with a large 40kg-rated carabiner, but you can pick up a good little one from Bunnings for about $5 if you need one to interface between your bungy and the hanging strap attachment shackle.
(The part of the hanging strap sticking up with the Zenith logo on it, is just excess length - about 70mm - that I haven't yet trimmed off)
I've seen the attachment from the Pro-Swing 45 advertised for this purpose recently, but that is bulkier and so needs to be moved each time you fully collapse the detector. It is also much more expensive if you have to buy the Pro-Swing service pack to get one ($40+) and it's less strong than the Zenith, which is rated to support a 40kg load!
The hanging strap comes with a large 40kg-rated carabiner, but you can pick up a good little one from Bunnings for about $5 if you need one to interface between your bungy and the hanging strap attachment shackle.
(The part of the hanging strap sticking up with the Zenith logo on it, is just excess length - about 70mm - that I haven't yet trimmed off)