LOOKING FOR IDEAS FOR ACOUSTIC GUITAR FX - NATURALISTIC DIGITAL or ANALOGUE

[HeadwayMusicAudio]

I wonder if anyone has any suggestions of FX resources for Acoustic Instruments, mainly acoustic guitars, so nothing too extreme or esoteric, but digital or analogue?

These might include:

a good 12 string effect ( modulation + short delay),
a reed type thickening, modulated sustain effect
ADT
Tape Echo Slap Back
Lesley Cabinet
Harmonizer
Mandolining

Any suggestions of FX, schematics, IC's, Defunct relevant products ?