Does anyone have an opinion about the Altrider rear luggage rack vs. the SW Motech rear rack as far as top boxes go. I'm concerned that Altrider's mounting relies on such a small area and the weld strength of the ATAS's rear rack vs. how the SW rack mounts to the tube with points that are a little further apart. I will be mounting the 42 liter Givi Outback Trekker aluminum top box to it and doing some two up riding also. Try not to get an excessive amount of weight in it but can't say it's always super light either. Any preferences on either?