If you haven't already, join the Black Widow group on facebook. Lots of good advice on setting up the printer and the group has developed an extremely good 'community guide' to walk you through potential issues with the printer.

The biggest issue with this printer seems to be consistent quality and that is where the community guide comes in.

I've got my BW together, but have not printed yet. I hope to get the extruder calibrated and finally do some printing this weekend.

FYI, despite quality issues, Tevo stands behind its printer and will replace defective parts. It just takes a while because everything warranty related comes via slow boat from China.