Topic Logic Tower
  The Logic Tower is a three-dimensional puzzle consisting of a total of 15 bodies that can be assembled into a tower on two, three, four or five levels.

There are more than twenty thousand possible solutions.
Presentation There is no need for a presentation and instructions here - just try it.
Data You can find my previous solutions in the small 5-page spreadsheet.
Notes The most difficult thing is to keep an overview of the previous solutions
January 2017