Thanks! The beams/pegs/axles are bigger than in LEGO Technic in order to make them stronger. The snap rings also work differently so they cannot move. However, you could easily design a LEGO interface because the kbricks cube size is a multiple of the LEGO brick size.
In order to remove the slide connectors between the cubes you can either pull them out using a needle-nosed pliers or push them out using a hex key.