RTA with variable airhole diameter?

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Hi,

there are several RTAs that offer solutions to have variable air holes below the coil to offer optimized air flow for different vaping styles ... MTL, DTL and all types between that.
All of these solutions (at least as far as I know) are based on differently sized screws or inserts into the airflow hole. The Skyline for example has up to 10 different inserts that can be replaced, but every time you want to change it you have to completely rebuild your deck..

IMHO the optimal solution...

RTA with variable airhole diameter?

RTA with variable airhole diameter?