Many thanks for the replies guys.
I have a copy of the original spares book for this model and it doesn't even show a rigid frame, I was most disappointed as I bought it just to verify that the lug was threaded.
I have a stand like the one shown in the Draganfly catalogue, which I had purchased as new old stock from ebay, there is no way that it will go on the rigid frame or even the 49 plunger frame that I have (no stand on that either).
Is the photo on Peters post a pivot pin for the plungers stand?
I have other photos but could not work out how to insert them in the text