I see on ebay several diffent aluminum brackets for the EM-10. Does anyone have experience with one of these? I have a little MeFOTO A320Q00 travel tripod (with a "mini-arca swiss" plate 25mm wide) and an older manfrotto 108 head with a slightly narrower plate. So neither is compatible with the "standard" arca swiss plates on these brackets. They are about half the price of an ECG-1, and just dumb metal in both cases. I plan to mount legacy lenses weighing about 600g and a panasonic 100-300, about the same mass.