Since a few weeks I own two MAUI 11 G2's and am very happy with them. Because of the fact the spacer-colomn is MALE (pins and connectors) at the upper and lower side it is not possible to place the speaker colomn directly on the Sub cabinet.
For my home studio use the speakers are positioned too high, so I built a short spacer-colomn using the MALE parts of 4 mounting kits M G2 IK 1.