I like using this tool instead of a screwdriver. The one shown is on the CSP website but there are other sources.
I got mine locally here: https://fanchers.com/store/ols/categories/volkswagen , I dipped the handle in Plastidip. The cost here is $30.
For a couple of dollars more they have one that grips both sides: https://fanchers.com/store/ols...hing-stainless-steel
For $8 you can get a leather-covered handle.
They also have a flat 21mm wrench for the nut: https://fanchers.com/store/ols...er-handle-type-1-2-3