my last fight with a phaser went a little wrong for me. It is still lying in my Box of the "Veros than knocked me down!" what a mf. But Im up for action again. I was taking a look at that one, and asking myself if this would take too much effort to design, as it seems to be a take on the mxr phase 90 with some added bells. Interesting. Here is the link to the manual and schematic.
http://www.tonehome.de/ibanez-effects/narrow-box-series-w-square-switch/pt-909-phase-tone/https://www.youtube.com/watch?v=2tcBwGEE_6s