Im using an FTE Max Evo spectrum + Mer - Ber readings.
Biggest dish i tried the black ultra was on 2.7 offset dish for 28.2E giving me 3db`s more on itv frequency and boosted the MER 2.2db`s up,
making the receiver able to lock.Always talking for fringe reception of 28.2 ( Cyprus ).
I will look how to get a titie and try it also on similar setups.
My thought is that a feehorn can and must be used on lnbs that they are actually made for or in case you remove a part of the original flange on the current lnb.