For who is familiar to the process of molding and casting liquid rubber or plastic, from time to time -especially when the floor or table is not perfectly set- to obtain a leveled cast with a horizontal finishing top is handy an adjustable surface. Follow upgrades and further THINGS @ https://accedtech.wordpress.com/The adjustable pad -set in a 5 mm thick glass plane- do the trick. The screw allow you to adjust the level of the plane reaching the correct horizon. The integrated vibration motor (common vibration motor usually present in mobiles generally with 1.5-3 volts operation range) is also an handy mean when you use particularly non-viscous liquid plastic. Indeed using vacuum degassing is often not necessary -or even make it worst- with liquid plastic: while gentle vibrations help little bubbles trapped into the mold, to quickly reach the surface before the plastic final set