Creative ways to enter Historical Override Amounts

Summary:

Has anyone come up with a creative way to enter Historical Override Amounts that could be 1) entered with a life to date balance and/or 2) carry up to a parent entity with the same default currency?

1) The Historical Amount Override does not allow simple input to the YTD Input member

2) We can find previous postings on customizing rules to copy the override amount to a parent entity since it does not roll up by default. Has anyone tried different iterations and found what they think is the most elegant solution?

Thank you in advance.

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