Looking for an ultralight sewing project? Six Moon Designs have this excellent free pattern for a cat cut tarp complete with insect netting plus sewing instructions: https://www.sixmoondesigns.com/images/stories/pdf/Pattern_NightWing.pdf A number of others are available if you look for them, eg here: http://www.backpacking.net/makegear.html PS: The ‘Jones Tent’ (approx 500 grams) is not named after me!
PS: SMD seem to have pulled their design. Here is a very similar design posted by Australian Outfitter, Tier Gear. They deserve your support; http://www.tiergear.com.au/25/catenary-cut-hex-tarp It looks very good to me.
NB: They also sell the above tarp for A$160, a very good price for a quality product. You could use it instead of a tent, or as a hammock tarp.
See also Quest Outfitters (USA): http://www.questoutfitters.com/patterns-tent,sleeping%20bag-cart.htm.