Hi, looking to make my own tent for a mark 2 – 7115, I have a dometic old sewing machine with some size 80-100 sized needles and some sewing experience. looking for any tips of materials, patterns, do’s and don’ts im looking at whether 8 or 12oz cotton or rip stop nylon would be better. use of poles to spread out from central rollicks would be interested in any thoughts paul