Begode RS mudguard / fender

I used the Gotway mudguard for a week and realized it is fairly useless ...
My pants and back were completely sprayed with water and dirt after each ride.

Hopefully this solution will work for you. It is a snug fit and shouldn't move once installed.
You can use either one of the two versions, according to how secure you want the piece to be.
There is enough space to accommodate an off-road tire.

The piece can be printed without support