I fitted four of the quadrant stays to my hatch, in a similar fashion to how firefighter did in his van (as per the link wodnas gave you above). I carefully measured where to position the bottom brackets so the sliders would stay clear of the flyscreen when the hatch is closed. When the van is actually set up on site, I tend to only have one end of the hatch open (away from the wind direction). The set-up has worked well for me over 4 years of travel. After installation, I added an 'improvement' to the locking bolts, by punching some leather washers out of 2mm scrap leather. A washer was placed either side of the slider and the locking bolt passed through the eye of the washers. They act as friction washers when the bolt is tightened onto the slider. They clamp the slider securely in any position, and protect the chrome plate on the slider from scratching against the bracket/bolt.
I like the idea of the quadrant stays because you can open the hatch just slightly (in heavy rain or wind) or open it fully in calm sunny weather, or anywhere in between. The drop leaf brackets seem to be an either/or proposition - either full open, or shut
Hi Rob & Al, Yes I have re-positioned the original "quadrant stays" higher in the hatch. The idea works but it is a handful for my wife & daughter to operate, hence to lift either end is OK, but here in Qld we will need the hatch to be fully open more of the time. I will research at the Sunliners meet at Elliot Heads in two weeks. Cheers Brent