Dave, if I may....
I have a Bisontelt Tundra 8 the same as SW.
The supplied groundsheet is a very simple disk of waterproof material with no means of attaching it to the tent - it is adequate, but only just.
My prefered groundsheet is a large polytarp from a builders merchant, 7m square from memory. I cut a "T" shape cut from one edge to the centre - so that when I have the stove going, I can fold the sides of the "T" back, leaving a bare earth walkway upto and around the stove itself. The larger size also allows bunching of the spare material at the sides of the tent creating a better draught seal and preventing water ingress under the sides.
HTH
Ogri the trog
I have a Bisontelt Tundra 8 the same as SW.
The supplied groundsheet is a very simple disk of waterproof material with no means of attaching it to the tent - it is adequate, but only just.
My prefered groundsheet is a large polytarp from a builders merchant, 7m square from memory. I cut a "T" shape cut from one edge to the centre - so that when I have the stove going, I can fold the sides of the "T" back, leaving a bare earth walkway upto and around the stove itself. The larger size also allows bunching of the spare material at the sides of the tent creating a better draught seal and preventing water ingress under the sides.
HTH
Ogri the trog