the use of incorrectly made cylinders may lead to the most unpredictable consequences

Well, dang.
I've been using these wands made by a young man in Connecticut who cranks out up to 40 pairs a day. Who knows which crystals he's putting inside.

Instructions for using the Wands of Horus

This is a long and detailed article about the power of they pyramids and possible misuse of the wands that are so connected to them.

E.g.

Today we have just slightly opened the door to one more secret that will help people to see the true level of the Ancients’ knowledge and take one more step towards an understanding of the history of the previous civilization.

Several thousand years had to pass, before we again succeeded in discovering the secret of the reasons behind the construction of the pyramid complex at Giza, which is only a part of a whole system embracing a once immense territory from the Pacific basin through Eurasia to the shores of the Atlantic.

Irrespective of which particular civilization, Hyperborean or Atlantean, was the source of this knowledge, it is evident that this knowledge did not help to change the course of history.

Ancient Egypt suffered the same fate as many other civilizations before and after. It was not the knowledge that was responsible, but those who possessed that knowledge, people who were in one way or another motivated by personal interests and not those of mankind as a whole. This led to the breakdown of basic ethical principles and, consequently, to degradation and oblivion.

Recognition of this will, in turn, help you to sort out the sources of today’s problems and to see what lies ahead for us. We are still only at the beginning of the road and we hope that the knowledge that is returning to people will be carefully analyzed and not used for harmful ends, and also that all ethical aspects will be taken into account, since ignoring them is the chief cause for the present state of our civilization.

The present book contains the relatively small amount of information that will allow you to form an initial picture of the knowledge of the Ancients. More complete information about the make-up of human beings, the pyramids, energy complexes and what lay behind the knowledge of the Ancients, invisibly guiding the world, will be provided in a larger publication that is currently in preparation.