I have sewn all of my life including professional costumes and heavy fabric. It would take more cutting/sawing time but depending on the sharpness of the knife, also if the tent was frozen, that may have a factor, but for me, the fact that they cut through the seams is a very odd way to cut an area for peeking. It tells me whoever made the cuts was not thinking about having to repair those spots or how much damage they would cause from the wind, which is witnessed by the tearing occurring after. The weight in the seam in the middle would make it flap with the weight bearing on the middle which would cause further tearing, which it did. Yes, I think an 89 cm hole to view out of would be too big, unless they needed the hole bigger because they could not see what they needed to see from that position. That may be why 2 more holes were made in different areas, 3 different search holes until the last one told them what was going on outside the tent.