I played around with my BlackCat tarp and I think it should work well. Since my spreader bars are only 31" wide and my tarp is bigger than the JRB cat tarp, I wont need to use the tent poles. The spreader bars touch the sides but it is no big deal. Once occupied, it clears the tarp. Question for ya Grizz.....what's the best way to measure the doors that doesn't require a PHD in mathematics?
How well does that 1/4" wide free magic hold the doors together? Seems like it would come off a little too easy. Was thinking of using 1/2" wide. I wont have a seam down the middle like yours. I'll just undo the sides when entering/exiting.
I also wont be putting bar-tacked rope on it. Not sure I follow why you did that.