I was emailing with Kevin of KAB about the differences between the tonearms of the G/GAE vs. the GR. He doesn’t have a G arm for comparison. He didn’t know much for certain except that one has a magnesium arm tube and the other one is aluminum. He said there was some suggestion that the bearings may be better in the G, but he didn’t have any specific evidence. He also thought the G arm would at least have the same wire that was in the M5G, and that is pure copper. As to the great cost difference, his research lead him to conclude that aluminum alloys are less expensive and have a lower die casting cost. Magnesium alloys are expensive, and the die casting cost is quite high. Somebody needs to buy one of those G arms and take it apart!