Square base plate, two triangular uprights welded to it with bolt holes to allow it to be lowered.
Under the base plate and on the inside the roof are two rubber sheets, but I need to put in slightly thicker ones
Can just about make it out in this photo;
Guys are held with a kee-clamp thingy bolted through the roof
The flex 200 turbine has an even number of blades which can increase the forward/backward motion of the turbine, so get a really stiff mounting pole. To get the turbine out of head/hand reach you'll need a pole about 8ft+. Our boat changes horizonticality depending on how full the water/fuel tanks are and other ballasting so try allow for a bit of variability in how vertical the pole is to keep the turbine horizontal.
A.