First - Harry, I just listened and "Liked" on FB. Cool jams! Nice way to start the day.
Second - Hematoma - I have one and I really like it. I've always gone for Tube Screamer-based overdrives, and this is probably the best I've found. I went for the "Tone Stax" option, which gives you 2 JRC4558 chips piggybacked. It really sounds great. There's no blend knob, but they have this feature - "Carefully constructed circuitry allows the original bass tone to pass through unaltered. No loss of low end." - which I kind of like better. The clean boost is a really handy feature too. Nothing but good things to say about that pedal!