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Been building competition robots for almost twenty years with that stuff and printers for half that long.

I have found that printers with frames that are made of 80-20 aluminum can become "loose" after a while. If you have a lot of long prints, you would be surprised how much zig-zag motion that transmit...

Do not know anything about the company but the price seems very cheap? My only concern is they offer no heated build plate option and finding a heater for that size might be difficult? Without it, yo...