This baby is sweet, fired up first try! I used 1n34a diodes. For the cap value changes to increase upper octave, I liked a 1n in C10 and a 470p in C12 best...less fizzy but still very present upper octave. was gonna do a 64 Impala in some three-wheel motion but decided to do go the road less traveled and do a lowrider bicycle instead lol.