Hi,
I read there are several people changing the CW to CCW windings of a choke to get opposite voltages. This is wrong, Don said all coils CW.
Did a few test on my VIC. No resonance wfc connected. (see attachments) Scope probes connected to chokes. No inverting settings enabled on scope CH1 or CH2 channels.
Test1:
Wave/Pulse generator device. 1Vpp offset 500mV pulse 50%+ duty cycle input to primary coil. Offset didn't change the primary PULSE AC shape.
I did a test how the choke 2 behaves if it is CCW wound. Well on first resonance frequency it didn't had opposite voltages.
When I adjust it to 2x resonance frequency it goes to opposite voltages.
We see the pulse shape is distorted.
It is possible to make it PULSED again to change frequency, but then resonance is lost at chokes and secondary coil.
How can PULSE SHAPE be cleaned up? Placing resistor parallel over primary?
Test2:
PLL Pulse generator (Stan VIC circuit) Voltage amplitude input 12V DC at TIP120.
My coils are now connected what Don has in his data.
All coils are now CW.
First resonance frequency has opposite voltages. Second didn't. So all coils work CW.
Problem I have is the PLL didn't maintained 50%+ duty cycle above 10kHz. So I can not test my circuit as I want. Need approx. 15kHz to get resonance.
Pulse shape is better, but due my PLL it is not 50%+ duty cycle. (core material or WFC lowers resonance frequency)
When I change amplitude my PLL duty cycle changes too, it should not do that! Frequency is voltage independent.
(NOTE. Just wanted to show a few scope shots,
what PULSE, PICKUP and CHOKE signals may look like, to compare with other builders here on the forum.
It could give new ideas and insights how to build the VIC.) 
Br,
Webmug