I like it. I've had the lift on it since about the seond week I owned the bike. I don't really know if I have a decrease in mileage. I get a consistent 50 miles before the gas light comes on.
I've never seen that, but I've seen similar ones on the forums here. I don't know why it wouldn't fit just off the top of my head, do you? Might have to relocate the turn signals or something, not sure. Maybe the headlight is different but I was under the impression that Sportsters used the same headlight across the board. I don't know how those mount though, and the 48 has a built in riser that may effect the install. That's just ideas off the top of my head as to what could get in the way.