I finished sewing this mei tai. I used the instructions here: http://www.instructables.com/id/Easy-as-ABC%3a-Asian-style-Baby-Carrier-or-Mei-Tai/
I'm not super happy with it as it's not much easier to put on than the stretchy wrap we have and it doesn't fold up as small. I was imagining it folding up small enough that I could just keep it in the diaper bag a lot of the time but that is not the case at all. I still think I might use it a bit. It has a lot more head support than the ergo (especially when I added some safety pins to make the top tighter which I didn't have in this picture) and it is less hot than the stretch wrap.