Just got this and first impression is that it'll be great. The fingers are soft, but only let stuff through 1 way. Tried to put this on my x7 low profile hopper, and it won't go on. Tightened it all the way down, and it still was loose and fell off by turning it upside down. I had to get some rubber bands on the lip of the hopper for the speed feed to hold on to. Everything else was great about it except that.
Doesn't Fit Low Profile 
Good!