The forces behind the Kossel Pro have proved to be a huge disappointment to the community. Documentation is very poor, there has never been a BOM released and updates and communication are few and far between. The printer itself was over a year late and there are still folks waiting for their assembled kickstarter printers. Users are bricking boards and breaking parts due an unbelievable lack of support. If you read their forums you will find folks whose printers have been down for months waiting for replacement parts or even an answer to their inquiries. While my printer is doing great, I came into it with a lot of experience building and operating 3d printers and relied much less on the company to help me. In good conscience I cannot recommend this printer or company to anybody.