pete,
i agree, there is no reason to not try new methods. i just stick to peat pot method since it works for me and it's easier for me to set it up that way. it fits into the clear bin for humidity, and i don't have to water it too often, usually i never water them until they go into 1 gal. as to root getting killed, i'm sure they are, but i still have good roots penetrating the peat pot and circling around the cup... 2 liter SIP is very interesting, and i thought about trying that, but that will limit the number of cuttings i can put into the humidity bin. with staggered placement, i can fit 15 cups per humidity bin.. if i go 2 liter, that will cut down amount of cutting that i can put into it. during the winter, my study has RH of 13% or lower. without humidity bin, the cuttings will die rather quickly. my whole objective is to keep the cuttings live until the night temp outside is 50 degree F.