Too bad no one in the U.S. makes a I7 hold down bracket for it. I know Duniek makes some, but I don't want to wait weeks to get them. Anyway, very, very, very nice work Fitseries, you have some mad skills. I am assuming it uses the rubber 0-ring from the original block? Also, what are the lowest temps that the acrylic will take? I.E. -20c? Thanks, makes me want to get another D-Tek block. Maybe I will.