rolls is not a bmx saddle, it's a classic road saddle.
i've got one and don't seem to have any problems with it. sometimes you do have to sort of squeeze it in a little but it shouldn't be a problem (e.g. my san marco regal) - i sort of just slip it in and as i tighten up the bolt it'll naturally sit flush.
all my saddles are italian (san marco, selle italia and isca) and they all work fine with my seatposts.
rolls is not a bmx saddle, it's a classic road saddle.
i've got one and don't seem to have any problems with it. sometimes you do have to sort of squeeze it in a little but it shouldn't be a problem (e.g. my san marco regal) - i sort of just slip it in and as i tighten up the bolt it'll naturally sit flush.
all my saddles are italian (san marco, selle italia and isca) and they all work fine with my seatposts.