it’s been over 4 years since I put this together and it’s still going. I’ve added a heated bed and a diagonal support from the top of the frame to the base to increase stability the construction is somewhat not rigid. The support has improved the quality of the prints. 

I would like to get finer resolution which is not possible I the current set up as the y axis has an enormous amount of play - it was a backlight carriage from a flatbed scanner so only intended to travel in one direction and accuracy was not critical.