I wish I had come across those hinges a few years ago Colin, it would have saved me £75! I plan to use the tilt in Scotland hence, I need them to be solid..the problem I had was that the panel frame was not strong enough just putting the hinge on the edge, so I had to reinforce the frame and eventually came up with aluminium engineering extrusion (pic) luckily, I found a size that was a perfect fit after a Lot of surfing! The extrusion has a channel for sliding nuts which was ideal! The panel is 164 x 99 x 3.5 cm and I can tilt it to the left or right, by undoing two security bolts on the opposite side..The idea of the hinge is that and branches will ride over the panel....
As far as tilting the panel this time of year for instance, it would need to be at something like this angle (pic)
Hope this helps!