At this price point it is hard to complain! All the 3D printed parts have been replaced with nicely finished ABS parts. The 20-20 extrusions are well and cleanly cut, requiring minimal de-burring. The cast corner hardware isn't the best, best satisfactory. IT does have the rounded t-nuts that fit through the slot so that's a plus.The spindle motor is what it is. What will it cut? Think Dremel type power, but lower RPM. Would you use a Dremel to machine an aluminum/brass part? Probably not. It comes only with a steel ER11 collet chuck which is nice, but probably a little too much weight for this spindle. Earlier versions came with a simple brass coupler to hold bits. Although not as ideal as a tool holder, it would probably perform better.The included control board (Cronosmaker v2) and spindle holder support the laser module should you decide to add that later. The board also supports 6 end-stops,and a z-axis probe, none of which are included.The only real fitment issue I had was the x-axis lead screw that runs across the gantry. It inserts into a captive bearing on the floating end. The screw is small enough that it doesn't actually engage with the bearing, this rattles annoyingly. I wrapped that end of the screw with a couple of turns of Teflon tape which solved the problem.All the linear guide rod bearings are the typical Chinesium type, bone dry, and a bit crunchy. Gently flush them out with some solvent/cleaner and lubricate generously before assembly.After these small changes, with the spindle power off, the machine is running virtually silent. Nice and smooth.Rigidity isn't that great. Most of the flex seems to come from the small diameter x-axis gantry guide rods. The 20-20 frame is plenty rigid, I just wish the gantry guide rods were thicker. It doesn't take a great deal of force to flex and move the spindle carriage.You'll need to be creative to mount end stops (not included). 3D Printer is recommended for that.I would suggest making some sort of backing on
jayMac 
