Thank you I will try that. I am trying to understand the exact purpose for the need to tune the feedback TX line that is tied to the FET gate. Is it the parasitic capacitance and inductance of the transmission line that contributes to resonant frequency, which is why the oscillator output doesn't oscillate exactly at the resonator frequency?
Also, I noticed that there is only negative conductance locally around the center frequency when looking at the admittance chart. How much of the frequency spectrum should be negative conductance for an optimal design?