Unfortunately, “hole thru” electronics parts that we use in the kits at General Guitar Gadgets are becoming obsolete at an alarming rate. We have had to use different kind of capacitors that no longer look like some of the photos of the PCBs in the instructions. Below are photos of capacitors from some of the kits. The markings are not standard so you can identify them by the photos below.
0.001uF capacitors look like this: (marking is 1nK100)
0.1uF capacitors look like this: (marking is u1K63)
1uF capacitors look like this: (marking is 1uK63)