I am sitting here after filling a few on-line store orders for my customers. I am watching "MamaCetus" (My 3D Cetus (brand) printer doing her thing. She's very slow because that IS her thing, using only 150 micron layer height. BUT she is producing outstanding 3D printing. I do almost all my printing these days at 150 microns. Sometimes I drop to 100 microns. The penalty is very long print times. The reward is very nice looking prints. When I started printing several years ago, I thought 300 microns was the normal height to print. (it was...) I considered 200 microns a venture into extreme printing. I thought 100 and 150 micron layers were impossible territory. Boy, was I wrong.. At the time...