I'm sure you could and I know AionFX has some suggested values for the readings on the transistors for what they consider spec. However, I generally just go by sound -- if I like the way it sounds, I call it done even if it is a mis-biased.
Here's a build report that has a lot of info...
For MkI I've got these notes for hfe ranges:
Q1: 55 - 80
Q2: 65-100
Q3: 100-140
Also, replacing Q2's collector resistor (r5) with a trimmer to bias Q2 correctly can help.
That said, I'd socket the transistors so you can audition them for the best sound.
Nice build through all the pain. I'd definitely shy away from them but I've built a lot of PCBs from them and only one I couldn't get working well.
For the Darkglass stuff, I'd look at AionFX's versions of them. Those do work and are a breeze to put together.
Just to add on to what swelchy said, this is one of those circuits that is best to breadboard first to make sure your transistors are going to work in it or socket both the transistors so that you can plug and play different ones until it works.
This is one of my favorite modulation circuits from SeppukuFX that you can get a clone of. Not quite as weird as Cassette or Memory Loss but loads more usable. Awesome job on the graphics.
I did and I would have but I had some foot switch breakout boards I had made and just hadn't used. Desoldering a 1 cent resistor wasn't worth the time or effort.
Over in the builds section, it was mentioned we needed a thread for DeadEnd FX project build templates. So, who has some Tayda Drill Templates they are willing to share for their projects?
I've got a few of the Last Gasp Arts Labs PCBs that I'll be building soon, so if anyone has some templates...