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simulating quadrature oscillator

Hello

I want to simulate a quadrature oscillator, but I have convergence issues. Sometimes It converges with some settings like gear2only, skip DC, initial conditions, etc, but with some tuning in component values it does not converge again! Sometimes only I-core oscillates and Q-Core does not or vice versa.

I have tried, transient, PSS, HB simulations, but still I can not find an ultimate solution for my circuit to converge. It is a quadrature oscillator based on transformer coupling. Also I want to know that which nodes we should introduce to the simulator as Oscillator + node and Oscillator - node? Because circuit has four oscillation nodes!

It would be appreciated if anyone can help.

Thanks,

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