@Nyemi,

There are errors into your "ZVS" DC CDI pcb.
Pin 4 of the 4N27 is going to too manny components.
Into the schematic pin4 goes to 1k resistor and 100nF capacitor (with a lead).
On pcb the lead goes from pin 4 4N27 to 4 components, extra are a resistor and a diode.
When I try to locate the rest of the components, I think I find more errors.
The circuit around the SCR is not good on PCB.
I've scan the schematic and PCB and put it on my website.
http://www.bucket.gompy.net/nyemi-pcb001.pdf
http://www.bucket.gompy.net/nyemi-sch001.pdf