The 45er is the smaller brother of the 90 (Der Phaser). Featuring only 2 instead 4 phase stages, he delivers a nice subtle sound and fits well into your basic sound.
The trimm-pot for biasing the FETs can be simply dialed in by ear. If it sounds good for you, it is right
Here the files to build the Phaser:
Schematic and pcb: 45er_schalt
Wiring layout: 45erwire