I don't think that NB SSB receiving with unmodified PLL LNB would be fun.
Just try to demodulate the EB with SSB and see how you must constantly adjust the VFO for a steady audio frequency.
With calm weather it may be possible but as soon as you have changing weather (e.g. sun / wind / snow / rain) and the LNB is exposed to that changing temperatures it will wildly drift up and down the frequency.
We will see...
73 DB8TF