3d Printer Bed Level Gauge

Sample of tool usage is in last part of video.
3d printer bed level gauge. Home the z axis of your 3d printer. If it homes to z max then send it to z 0 manually. To actually level the bed is really simple it just takes some practice to get it right. Now level the print bed the same way you do with paper.
Here is a good starting set of tools needed to maintain your bed level and nozzle gap. A piece of ordinary office paper cut down to about 100 mm x 40 mm should work. This is all in one video of published bed leveling tool that i posted on thingiverese. Move your extruder to a corner and position the blade under the nozzle adjust the screw until the led will light up indicating that the tip of the nozzle is touching the feeler gauge blade repeat the process in the other corners until you find the perfect calibration.
Start by tightening down all the screws so you have more room to work with.