4 inch adjustable flat lapidary

I designed this 4 inch lapidary to be ultra portable and convenient. Hardware needed - -1x M5x50mm bolt and nut. Used to attach the motor mount to the stand.-1x M5x10mm bolt and nut. Used for the disc. Other parts needed - -Assorted 4-inch diamond discs with either ½-inch or 5/8-inch arbor hole. -drip control Metalwork Air Flow Control Valve with Push-to-Connect Fitting, In-Line Speed Controller Union Straight, 8mm to 8mm, 5/16" Tube OD x 5/16" Tube OD (Pack of 2): Amazon.com: Industrial & Scientific-xd-3420 motor (make sure it has the threaded shaft) https://www.amazon.com/dp/B0B21YW465?ref=cm_sw_r_cp_ud_dp_HG9BFXBTX7XR1J0F3FW6&social_share=cm_sw_r_cp_ud_dp_HG9BFXBTX7XR1J0F3FW6-Adjustable voltage power supply Amazon.com: 72W Power Supply Adjustable 3V ~ 24V Variable Universal Switching AC/DC Adapter Minidodoca AC to DC Converter with LED Voltage Display and 16 Tips, for 3V to 24V Household Electronics - 3000mA Max : Electronics-Water pump- Amazon.com : AQUANEAT Small Fountain