Today I tried a guitar loaded with a Fernandes Sustainer pickup and I swear it could have held a note all day. My compressor pedal us great but it won't do that. What pedals could I look at that wouls give that endless sustain in the same way the pickup does?
I don't think anything will do what a sustainer does. A compressor flattens the frequencies coming in making the levels of them all the same, then as the note decays it increases the volume to compensate. It does what you want, but your note still decays and in the end the compressor gives up. You also pay for it in pick attack as the levels are all equalised.
All other pedals that add sustain do so along with something else, usually fuzz or distortion. Which might not be what you want.