The device is turned on which has a foot pedal, making it much easier and faster to show on and off. The Tiny Dragon contains a separate switch The foam used needs to be business and sturdy to face up to the mortar pressure right up until the cement sets. https://metal3dprinter04691.thechapblog.com/34459162/how-much-you-need-to-expect-you-ll-pay-for-a-good-aluminum-composite-material