I'm considering swapping out my Whetstone phaser for either a flanger pedal or one that offers flange, phase, chorus, etc. I posted in another thread, but I wanted to get more specifics of my own. As I've never used a flanger, can anyone please tell me what's meant by Through-Zero Flanging (TZF)? I know what flangers sound like, but don't know the terminology. In the other thread - asking for feedback on those who have tried the Jack Deville MOD ZERO and Eventide Modfactor - a few said they thought the Modfactor was a much better bet. What I'm after is the "classic" long "jet engine" sweep, extreme/weird sounds, and perhaps phase and chorus. The Modfactor has that and more, though some folks found it "cold". What about the A/DA Flanger? Strymon Orbit? Other "boutique" (oh, how I hate that term) pedals? I'd love to hear from those who have compared two or more pedals that offer flange effects. Thank you for any input you can offer. (Caveat: I play pedal steel exclusively, and I'm somewhat tech/mech challenged; an expression pedal is not an option, nor are different guitar pickups. Analog vs. digital is not essential to me; I feel nuances aren't as critical live).