Nice mods to the Pup Tent, and thanks for the idea. I may have one for you in return. Have you ever considered a canvas groundsheet for the pup tent? I have been searching for one for about a year now, but with no luck. I read somewhere that the US Army Pup Tent had one during the Korean War era but discontinued them prior to the Vietnam War. So I decided to take the bull by the horns and come up with something myself. I chose the silicone treated polyester canvas, 15 oz. for the groundsheet and had a friend hem it up after I laid out the dimensions and cut it to the size I needed leaving extra for hemming. I ordered a 12 x 6 exact size tarp from Tarp Supply to do it. I installed the grommets in their proper locations to align up with the grommets on the base of the pup tent and eliminated the grommets that were not needed. I have ordered the same kind of snaps that is customarily used in the pup tent and plan on installed the snaps to that it will also snap in and pan around the sides of the groundsheet.
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I also made a tent stove out of a 50 caliber ammo can this last weekend. I am picking up a welders blanket to cover the groundsheet and the tent to allow me to use it in the tent without damaging the groundsheet or the tent.
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However, here is a pic of the side zippers installed on the tent while I used it last March on an outing with some friends at a local park.
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However, the good news is the groundsheet, I am working with Tarp Supply and they are considering manufacturing the groundsheet as a regular item with just the grommets, the snap kit to create a snap in assembly is still a possible consideration. Anyway, thanks for letting me share my mods and thanks for sharing yours, awesome job and thanks again for the suggestions on the zippered sides.