Mongol Device - Boost/Preamp

TONE MONSTER SG-2D FULL THROTTLE PP Mid Boost Preamp Guitar Effect Circuit 9V

Amaze Boost - AMZ Mini-Booster Clone - Guitar Pedal DIY - Five Cats Pedals

Sea Device - Chorus/Vibrato

TONE MONSTER SG3D NITRO BOOSTER Guitar Effect Circuit Expander Hi~Lo/Flat/Mids

Amuzik booster guitar clean boost - free post

TONE MONSTER SG-2D FULL THROTTLE TG Mid Boost Preamp Guitar Effect Circuit 9V

29 Boost - 29 Pedals jFet Boost Clone - DIY Guitar Pedal - Five Cats Pedals