I started looking at this class of imported machines recently. What is the shipping cost/time on such units? What about availability of spare parts? Or the

I started looking at this class of imported machines recently. What is the shipping cost/time on such units? What about availability of spare parts? Or the quality of the service/parts manuals? These questions are not easily answered on Alibaba, but a properly-done open source design that uses off-the-shelf parts should make them almost entirely moot.