jack, perhaps the question isn't so much "has this specific unique situation occurred before"... eg, the whole pref 70/30% adjustment being possible.
The correct question, to me, is - has a plan been modified by a court, when the plan provides such flexibility.
The answer, is YES. We heard this in prior Disclosure Statement objections -- objectionable, specifically, because the prior plans had no flexibility for the court -- eg, the past 2 plans that made it to Disclosure Hearings/Confirmation Hearings were highly inflexible -- allowing for NO adjustments by the court. All the court could do is reject them, state why, and wait for another round of it all.
{In fact, the irony is, had the debtors not 'overreached' a bit on the prior plans, concurrent with having no inflexibility provided to the court, we may have been confirmed by now.}
So, whether or not "this" kind of adjustment had been done before isn't the question for me. It's whether it CAN be done, if given the flexibility -- and the clear answer is yes, a court can -- and does -- to avoid another delay in confirmation.
...Catz