Sorry bout that totally forgot about 121 being linear. I have a super dish in the top of the barn and they do offer some surface BUT how much of that surface is devoted to signal trap? I would assume the same area of dish as a single lnbf DN dish which would make it to small. After all the shape is there to be able to catch 3 sats. At the same time I have a KTI 3 lnbf dish that is just an 18". Who knows
In reference to the dish "tilt" just set the tilt to what your skew setting should be for the sat in question and that should resolve that problem.