I have visited your website, very interesting.
I was particularly intrigued by the "Diamp".
Nice that you still use an analog scope, although with digital readout. Is that an Iwatsu?
Now a comment for your "JFET joule thief project" for lack of a better word. At input voltages above 0.9V, the reverse bias appears to go higher than 9V...that is not good for leds.
Perhaps if the main voltage source will be a single alkaline battery, you could reduce the primary/secondary turns ratio a little.