Price super- quality?

Of course I tried the extension rings immediately after unpacking. Unfortunately, I realized that the quality of the transmission of data in large intermediate ring as real life is .... sometimes it works ... and sometimes not. The large ring has often complete failures. Meanwhile, I have learned but to arrange myself with. If I use a smaller ring between the large intermediate ring and the camera does everything.
Ultimately, I can also use the large ring with a small detour. In the two small rings, the data of the lens are previously transferred without failures.