Since 2014, various methods have been explored to prevent unmounted drum skins from deforming. Initially, a thick plywood plate with centering holes was used, secured to the ChangeHED skin by a metal tensioner. While this approach was effective, it was costly, complex, heavy, and did not protect the skins from environmental factors.
In a later attempt, the transport plate was made thinner and held in place with rubber plugs. This solution was more affordable, easier to assemble, and lighter, but the drum skin remained exposed to changes in ambient climate.
After extensive testing, the vacuum bag method has proven to be the most effective. Though vacuum pressure may cause slight contraction of the skin, the playing surface largely retains its shape. More importantly, the vacuum seals the drum skin from the environment, which is the key to preventing deformation.
An added benefit is that if the vacuum bag becomes damaged, it can be easily replaced with inexpensive, locally available clothing vacuum bags.