Yes, Guytronix mods RAT2 pedals. Others will not work on the current Chinese variant. During the process of installing an on-board IC socket for trying different OP Amps (LM308 being a favorite) we also install a trim-pot ala ‘Ruetz’ mod. To wrap this up, we ruggedize the RAT2 for the harsh conditions of the road. No fears, our ruggedized RAT solution is the bee’s knees!