After some successful vase printing with the 1.2mm volcano and some dual printing shenanigans I wasn't so happy with, I decided to try something a little more normal. @Chase.Wichert had been complaining of the nozzle not restarting after each move so I wanted to see how to nail that. And @R Design was complaining of some Z artifacts every X layers, so I wanted to see if I had the same problem. I ran this test with Rigid.Ink black PLA. Nozzle is 1.2mm. Layer height 0.6mm. First layer printed at 225c with a first layer height of 99%, with 50%, speed 50% (of 3000 mm/min). Agressive cooling with layer 3,9,15 at 40,60,80% respectively. I chose a single base layer. 1 shell. and 2 top layers, with a 15% rectilinear infill. To try to address the problem of @Chase.Wichert I chose an agressive 0.8mm restart distance. Results: Even with 0.8mm, the seam is very present, but it does seem to be starting pretty much where it needs to be. The head just moves on a little too quickly. In theory 0.8mm should be enough for the material to hit the floor, but I think we'll need a larger number yet. I'll try a full nozzle diameter of 1.2mm next. Looking front on in image 2 you can see how horrible the top is. In essence, it looks like such thick dollopy plastic doesn't set quickly enough (and I'd put the fan up to 100% by this point partly as a test and partly to make sure the top layer had max cooling) to cover a 15% infill or connect well enough at 15% overlap to a single outline. I'm not sure whether to try two outlines or a bigger overlap. Another thing I noticed is that, being a normal infill layer, the top two layers seemed to go really fast, even the outline. So possibly a slower speed would help. The next three shots show pretty great dimensional accuracy and, as you can see from the last two, the layers are accurate and look great one on top of each other. This also printed pretty fast in just 15 minutes. The top layer aren't good enough for me to let it loose building RichRap's printer boxes, but a few tweaks and we could be there.