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I'm so glad that it's not just me who experiences these issues. I think it was Einstein said that there is 99 fails before success. That's Einstein who only has 99. For me it's more like 999. I've built 4 full CNC machines, countless 3d printers, engravers, and lots of different CNC style machines. I have a large 4' x ???* Machine 80% done sitting in my shop doing nothing as I don't have the space for it currently. I live on an island and there are very very few CNC machines here. Example I seen a 4 x 8 machine that was probably about 20+ years old running grbl I believe. Selling price was $100,000($70,000 us) I build machines and they cost me $500-750 to build.