With patience, drilling machine, and water go yet ...

Also with me is the top at the first attempt, despite watering the lawn, broken. But I have my sleeve exchanged easily at the hardware store to get start a new attempt.

The area in which I had to tighten the sleeve was a bit rocky, so my approach as follows:

1. drilled a deep hole with a drilling machine and a 40cm long drill and widened to approximately the diameter of the sleeve Eindrehgewindes.

2. The hole with a watering can well watered.

3. The sleeve carefully screwed.

After drying of the grass, the sleeve keeps very well and using the centering function allows the Wäschespinne perfectly straight.

Conclusion:

Recommendable without having completed the necessary preparations.

Disadvantage: A little pricey. Tip: use discount sales at hardware stores.