@Herman: that's how they are, just a single seam line on the very edge. Was not me, that's how it is sold. Yes, should fix the black bits properly, but also should redesign the triangular bits.
@Roger: When I bought it I was impressed by the silnylon gadget because my older tent just flooded. And I wanted space, hence a tunnel tent. Did not check the connections, thought, its not that cheap, should be OK. And the retail guy said, its OK for alpine. Seems to be more a fair weather model, but tunnel tents as such are not that stable as igloo likes are anyway.
Now, I am more concerned how to design these triangles. By now they are like this:
Ore shape the triangles more to the direction of the guy ropes=forces, so the load on the seam between tent and these triangles are distributed more even
Or better eyes so the force "finds" a proper way
BTW, tried the Mcnett TentSure, did not really rain last week, so could not try it. But was quite windy on Bogong High Planes. You guys have to wait on that one....
edit: fixed some spelling and grammar mistakes