My favorite distortion is a GGG Red Llama clone. Been using it for years. Great on bass, great on guitar. Has a bit too much distortion with my Markbass LMII -> GK 115 rig. Always thought it could use a clean blend for that amp. the Darkglass pedals are intriguing because they're also CMOS based. But I'm not certain they're worth (to me) the significant cost of upgrade. I haven't been able to find a schematic of the Darkglass Microtubes, so I'm not sure how the circuits differ. So other than expanded controls, what will I really get out of them over the Llama?