Not sure where you want the top G# added in 1-3. You should specify octave numbers (i.e. G#4)
Just an octave above the current bass G#. I never remember which number means which octave to be honest.
The caesura isn't correct when the timing of the track is still metered rests which is why I used 5/4 rather than a caesura
I don't really understand this since caesuras don't mean an exact time, but if you really want to keep it as a 5/4 bar then fair enough.
At meas 18-25 I don't know what else is missing. If you hear more voices feel free to let me know so I can add them.
It's not just things missing, it's also confusion of voices. I don't have the time to write out those bars tonight, but some examples I can give of where something funny is going on are:
-Missing C# in bar 24. This is the note that then moves onto the B# on beat 3 and then it moves onto a Bn in bar 25.
-The voice upper voice in the left hand of bar 18 sounds like it resolves down to a D#, rather than up a seventh. (Though that higher D# sounds like it's there too, I'm not 100% what happens to those two lines afterwards.)
-Missing a Bn -> C# -> Bn movement in bar 20/21.
-Vocal line mixed with organ line in bar 21/22, along with the vocal line seeming to jump around octaves a lot.
-The E -> D# movement at the end of bar 24 is from a lower voice that seems to have been omitted before that beat.
Just generally speaking the whole thing sounds a lot thicker than just three lines moving, and I'm not sure the fact it's on an organ is causing all of that difference in texture.