I just picked up 2 pb 13 ultras from Sonic boom here in Canada. Upon opening the boxes I was surprised to see one of the ultras had the magnetic grill, and one with the pin/cup design. Does anyone know when svs stopped using the magnetic grill? Even my sb ultra had the pin/cup design. Not that it really matters too much. Although I do like the magnetic better, and it hasn't rattled off yet. Just has me wondering if I somehow got a refurb? I guess its possible maybe they don't sell up here and I received one that had been sitting in their warehouse for a while. Thank you!