I only had two on hand to choose from. The B1stacked from Sadoun, and the CK-1 from SatelliteAV. I did select the CK-1 because it came with a lighter scalar. My intent was to use that scaler as an LNB-holder, and fit another (possibly conical) scalar on later.
But the weight of either LNBF didn't really concern me. My support arms are 1/2" conduit.
Obviously, I didn't have all the other LNB models available to try.