If a partner has invested over some time $10K and the value
increased to -say- $17K, and he does a partial withdrawal in
cash for $15K, does he have any tax to declare?
What would show on his K1?
Is it true that by his partial withdrawal in cash, the other
partners have now an increase in their tax commitment when
they eventually do withdrawals?

A partial withdrawal in form of appreciated stocks would
bring about a "tax transfer". What is the tax basis for this
partner and is there a change in the tax for the other
partners?

For this partial withdrawal, does the partnership allot the
most appreciated stock or would it be 'fairer' to tediously
select from various appreciated stocks a 50% gain equaling
the increase in -above- value from $10K to $15K?

Ado