I have attached the file, there is a TL072 dual that I downloaded from a fritzing github page. I couldn't get the TL072's components to separate nicely in the schematic, so it looks odd with a long lead but I tried to copy Eric Archer's schematic as closely as possible.
The part I am having issues with are the trigger in, the +/- rails and a battery, and too many jumpers. Something isn't quite right, there are way too many jumpers, I suspect the rats nest line rules may have been overly aggressive.
Here is one another group did: as you can see they tie the accent to +15V and they use a switch tied to +15V to give the initial pulse.
Paper PCB's Version
roland-tr-808-bass-kick2.fzz (86.9 KB)