i finally have most of the printer dialed in and am now trying to tighten things up a bit to get the prints as perfect as possible. The one item that seems to be eluding me is zippers and zits. If I use a set starting point I get a very noticeable seam. If I use random starting points then I get zits. I have retraction set to 1.70 as opposed to the default 1.4. Should I increase this again? Thoughts or advice?