I have to call back to my original post, dont do arbitrary capacity minimums, have a % of original design capacity as your minimum.
A 2100mAh minimum on first a cell that was 3400mAh compared to a cell that was originally 2400mAh are two entirely different beasts.
By design, manufacturers slate 70% of original as their 'throw away' point. Im inclined to be more optimistic on cells that started at higher capacities.
The long and short is its a good idea to test what different cells do.
Lastly, remember that capacity also affects the C rates for charge and discharge, so as a cell declines you need to account for changes in tolerances to stop the cells 'falling off the edge' quicker.
kind regards