I've been working on the Vox AC30 pedalboard for church and came upon a Zim at a price I could afford. This is the original version with a pair of H9 cards (a slightly higher gain take on the TS9). I thought it might make an interesting alternative to the FDII that's been on my board for a few weeks. I've had a chance to test it into a BF Super, a blond Bandmaster with C12Ns and a 65 AC30 TB head and cab. First of all, it's a bit of a pain to open up, but it's critical to do so, because the EQ trimmers are inside. The pedal set up perfectly for the BF Super was a bit harsh for the other two, turning the trimmers just a 1/4 turn or so fixed it. I set the green side up for slight breakup and a slight volume boost (about 11 on the gain), the red side is set up heavier (about 2 or 3) and also slight boost. The detented volume knobs are a bit of a pain because I can't get unity gain-it's either slight loss or slight boost. The voicing knob is either on 7 with a cut to about 9 or on 2 with a boost to about 4 (both warm it up a bit more, but the boost way increases the bass a bit more to match the Fulldrive IIs bass boost). The basic character of the drive is slightly different from the FDII-more transparent, more highs coming thru, seemed a bit harsher till I got the voicing sorted out. The FDii seems smoother out of the box. It really starts to shine when you use it for a flexible gain. With the FDII you've got a basic gain and the sort of boost/slight increase of the second switch. With the Zim you've got low gain, medium gain and some really sustaining high gain with both sides on. With the bridge humbucker (a Seth Lover) and volume set just below where the pickup starts to squeal, I can hold an E, B or G at the 12th fret and it'll continue to sustain. The FDII can't get that degree of gain in this setup, at least not without the basic setting being too high gain for the mild crunch I want it for (I have the Burn Unit if I need really long sustain). One of the reasons I've been looking for a pedal that puts both drives in one box is the decreased noise that the shared shielding creates. The Zim is quieter than the FDII to start with, and the high gain mode is significantly quieter than the FDII with both channels on. I still have to try it live in church, but I think this one is going to be a keeper.