Hi,
I want this one since lot of years, it's a QOTSA sound in a box! After saw the Mutron Phaser II layout, I think this one is smaller.
A guy on freestompboxes.org make one last year, but it's very big and I never been able to make it work.
This is the modified schematic (I think it's the switch):
The original one:
The first layout: