Just a general question. Which tricks if yours have you purchased, and need repairs because they were poorly constructed? This is absolutely not to say the effect itself isn't great, but from a construction point of view, needed extra work on your behalf. I am not talking about misuse from poor handling or excessive force.
My two main ones are:
Kovari Pom Pom Pole - the strings cut into the holes & make jagged edges. and I needed to install metal eyelets. Then reconstruct it.
Milk pitcher - Bazar de magia. The gimmick has very poor adhesion and within 2 uses, I had to use a much stronger adhesive. This has been backed up by others on this forum.

However, I still love these effects!!