That is right, no quick way to enter a schematic, just enter it, slow and surely. Once you get the hang of the quirky way it works, then you get better at it.
Only one channel necessary, it is good to match the ref designators as shown on one of the channels, does not matter which one, if they are identical. R?,C?,Q?,D? etc to match the one channel so we can refer them. Do not worry about polarized ecaps either, since first runs we use perfect caps with no losses, you can refine the caps later if necessary.
This NSA amp is different, it is much faster, doing so, it leads to stability problems when you alternate comps and do not re-adjust (tune) the compensation. We shall see how it behaves in sim.
I do not know if 20% margins on caps will make or break this design, we can play with that in the sim.
I do not use a pot but make up the equivalent of the pot value used, by using a voltage divider made of 2 fixed resistors. You run a ".op" sim to calculate the bias levels, adjust the voltage divider ratio to get the bias you need, through a few trial runs.
In the case of the pot in the ops bias tree, I just use one value, since the pot is usually 100R, I just chose a value between 1-100 that sets the bias in the ops to where I want it to be.
I use some 1n4148 diodes in a series string for a STV diode array, it is all you need, since there is no thermal feedback modeling involved. If someone wants to get advanced when we could model the STV diodes based on the data sheet, but it really is not needed for these simple sims at this time.
Good luck guys, I'll fire the starters pistil and see who wins the race,
take your time, it ain't a race. Once you are done I can look it over and we can work together on how to run the sims. BTW I got better at this when I read Bob Cordells PA design book and he had a great tutorial. Also from members at diyaudio. Lookup the group thread devoted to ltspice on diyaudio, it is excellent, with folks knowing way more than I know there to help us out.
Basically build off what I have supplied and modify it to match the NSA design.
Cheers