The BLACK series of silicon pedals is all new for 2020+. Each design is unique in some way, not a copy or clone of anything else. Simple and straightforward, these pedals are intended to be building blocks for your tone, placed in any order you like. No surface mount parts, every solder joint done by hand. I never use opamps in the signal path, with the exception of Phones (active filter circuits) and Metal, the latter using an LM3900, which is a Norton amp (much different than an opamp). In fact I am probably the only one on this planet making an LM3900 based pedal.