For assembly/insertion into the box for the fuzz. After break apart. Step 1, gently move Jacks under foot switch board. Then put top of foot switch only in hole for alignment.
Tuck Jack’s at 45 deg into side holes and use pliers to align. Slide foot switch reminding way in and loosely screw on outer nut.
Slide 1 plastic shim onto jack collar inside of case (might need to push jack into middle of case for clearance) then align with hole with pliers again and with outer collar and a plastic shim installed loosely screw in metal jack nut.

Finalize alignment of Jack’s and foot switch and tighten then insert board with POTs.
That worked a treat for me.

Though perhaps a bigger case next time might be easier. 😁

My son has now tried it out and is very impressed with it particularly using it as a Bass Fuzz.

Just a comment from my experience building it:
– The pots cant be just soldered onto the board as per the instructions as they need the leads bent a bit to align them with the holes in the box. I found it best to place the pots upside down in the top of the box to get the correct spacing and then put the PCB on top of them to solder them on. That way the legs of the pots can be tweaked to fit the PCB with the correct spacing to fit the box.

Thanks for a great kit – really good performer.