From reading you original post agin it seems you have not attempted to palpitate the eggs further down the body.. try that.

Keep the pressure with your middle 3 fingers from below the snake belly and cause a constant pressure.. it may move slowly (like an inch a minute) once you get it moving it may want to stop again before the vent.

If you can move it down the vent we will at least know it is moving.
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FR quote:
"Doing the same things over and over expecting to learn something else, is the definition of insanity"