Using a .4 and I had to slow it down to 2mm 3/s volumetric. The one on the left it was at 8. I just never knew nylon would stick well at 55c so made me wonder what else was added to it. Fans I found out from their email I got back as I was testing that they recommend are turned all the way off so I tried that as well on the last 2. Also, told me not to exceed 50mm a second which seems to me a bit slow? I would think it should be possible to get at least 80 with some other Nylons?