Thank you for your attention and discussion. I won't answer all the questions because there's too much space. Make a brief description here: 1 The yellow cylinder is the limit slider. In order to prevent the production of manual planing force in the sliding process, and many parts need to be processed are effective stroke, under which there is a "thimble" needed to process parts, to prevent parts from offset processing. The left and right sides of the base are respectively provided with two adjusting screws for adjusting the tilt angle of the base slide block. 3 The idea is based on a hand planer, the model listed in No. 6 upstairs is not suitable; the Planer itself has two side panels that can be used to adjust height and push-pull time limits; 4 usually thin and long parts are machined, although it can be easily accomplished with accessories on a lathe, machining Polyhedra without power heads and indexing devices is extremely difficult, even if there are no accessories on the milling machine. And some deformations are uncontrollable, so using this design in special cases is a conservative approach.