Keep all parts to that one carb in order, some like the CV tops and slides on the CV ones are matched assemblies. The idle mixture screws and throttle butterflies if one goes that far are pretty much matched too once they are well used. Needle/seat too if not changing them.
If you do the rack all together then if the carb cleaner is volatile it WILL ruin rubber parts like the air cut diaphragms, which you really cannot get to hardly at all with the carbs still in a bank. Some do it but insane, break them apart.
But if you pull all 4 apart you have to remove at least some of the choke plate screws which are staked in place to keep them from backing out. If you remove them without removing the staked back end of screw they are often ruined and the holes in choke shafts are too. Why you grind the stake off with like a Dremel with a rock in it. Then the screws come out easy and you loctite them going back in. I generally remove the inboard shaft screws and leave the outboard chokes alone, the shaft just sticks up in the air. Or maybe the other way around, been awhile since I did one. No need to remove all 4 though, only 2.