The thing about these trim pots on the screwdriver and other boutique stuff is to match the pedal to your amp and to your taste. Play around with them and you will be surprised! The brilliance knob on the screwdriver should be in front i feel, and the sharpness at the side. Sharpness to me is set and forget. Brilliance needs to be tweaked when played with different amps and venues. Aiya. All the knobs in front best. Heh. But that will make it bigger..
What I am surprised with the screwdriver is how well it stacks with other pedals. I'm driving it with 2 other overdrive pedals, and I'm getting a very very nice od/dist sound, perfect for hard rock and heavy metal. I never believed in using od/distortion pedals alone, except to drive a tube amp. Stack your od pedals, each on low to moderate gain, radolf used to say. And how right he is.