Been printing PLA on my R2 with, honestly, flawless results. Very happy. No hairspray, no tape, no nothing on the bed. Started an ABS print today, and started seeing the edges of the item curling up on layer 2. I'm noticing that the bed is pretty close to the open top of the printer when the job starts, and was wondering if we are losing a lot of heat up there. Either way, going to dig out the AquaNet, give it a quick spray, and try it again. Anyone printing ABS regularly on the R2 with continued success?