Reduction ring for Leifheit

A reduction between Leifheit Linomatic (clothes dryer) and ground screw.
I use 3rd party ground screw for garden clothes dryers. Leifheit Linomatic has diameter about 50-55mm and ground screw has insertable much more (60-70mm).

Delivered reduction rings (with ground screw accessories) became broken after first winter, so I decide make robust one.

There is cutout for securing screw (M8) and collar that avoid falling reduction into ground screw body.