The PVC boxes are likely handmade, machine left such traces not) but is absolutely not bad.
The assembly itself proceeded without problems until I was embarrassed the fleece. Here I still do not know if I've done something wrong, but to put in the Box brings only the first time a workaround, if you emptied it and on top of sets, one stands face the same problem because the new lower box now is full;) So is mine now the fleece under the bottom and the top box, so that the worms do not leave. However, they fall down through already and if I really einschätze they no longer come up on their own. So I have to help them every few weeks since. I think at the point is what designed wrong.
Otherwise, the farm works ... the worms doing fine at least for almost 2 months.
Therefore, the recommendation to "hobbyists" (in a good way), those who want to have everything at once, perhaps should look at a better model. But I have no comparison experience here.