DIY Pedal No. 6 is finished: "The Screw Attack". This one is a Tape Delay. Definitely one of the more advanced circuits, but not a terribly difficult build. : r/guitarpedals
The Stompbox-Builder's Secret Weapon - Premier Guitar
How To Make A Stomp Box & Electrify Cigar Box Guitars - NightHawkInLight - YouTube
Amazon.com: Delay-1 DIY Guitar Pedal Kit With 1590B Aluminum Metal Stomp Box Case Enclosure : Musical Instruments