Hi Adrian,
We did discuss this issue, my apologies for forgetting to reply. The cause 90% of the time is the tabs on the body are bent, broken or deformed, 10% of the time the holes that they plug into in the magnet are oversize. We will transition to a different mount in about 6 months, the tabs will be eliminated and in place will be 4 holes that attach the skimmer to the magnet with silicon bushings similar to how the 9012 and our pumps mount to the magnets. For now the likely resolution is a new body.