My method is for charging individual cells.
That is all that is required for top balance.
Give each cell a number and record its voltage.
You want to make sure you don't have 1 or more cells with excessive self discharge.
My method is for charging individual cells.
With your bench power supply you are limited to 10 amps.
Lets guess that your cells are at 70% DOD
280 amp hours * .7 DOD = 196 amp hours
196 amp hours / 10 amps = 19.6 hours per cell.
If you did the old style parallel top balance it would take 19.6 hours * 8 cells = 156.8 hours.
I have been suggesting that you charge each cell individually at ~20 hours per cell.
Suggest you re-read my posts and the doco that
@HRTKD and myself have written.
We have suggested two different alternatives to the classic parallel top balance.
Luckily you have time to get a good understanding of what top balance is and isn't before you proceed.