Hello, I have few questions regarding the Robo3d R1 plus: 1. Are there people here who print successfully and reliably PLA in 50 microns or better layer resolution? (I searched "50 micron" in the forum search and didn't see any clear answer) 2. What modifications are required to achieve 50 micron printing, and their estimated costs in addition to the printer itself, and what level of tinkering is required? 3. I would like to start a small, home based 3D printing service, and naturally I want to keep costs low, and have 4-5 printers running 24/7, will the Robo3D be a good candidate for such application, in terms of ease of use, up time, etc. Needless to say, I want as little print failures as possible. 4. If so, do you know where can I find a Robo3d R1 plus in Europe? I could only find the regular R1. If not, what 3D printer out there will suit my needs? Thanks!