Now Miro has verified the original, here’s a modded version of the Phase 45 and offering a few useful addition such as external Bias and a Mix control, Phase 45 / Univibe 10:1 Ratio switch and a Rate LED. The switch is 2 position 4PDT but you could also split it and use 2 x 2 position DPDT which will then allow you to select the caps individually offering a little bit more versatility.
I actually managed to get this 2 columns smaller because of the removal of some components and others going on the switch instead of the board, so it will easily fit in a 1590B.
