can someone explain how it works
for example, if an item gets a socket from a corruption - one can no longer puzzlebox it.
if i puzzlebox it and get, say 2 sockets to a shako, i can corrupt it to get a 3rd socket? maybe shakos can't have 3 sox even, say tal helm then.
or on an ik maul i puzzlebox it, i can get 1-6 sox? say i get 4, then corrupt it to get maybe a total of 6?

hope my written english is good enough for you to understand

If you box something before the slam say your 2os shako for example, that means when you corrupt you now have a lower chance of modifier on your item. because corruptions add sockets only to items without. so now your shako has a chance go corrupt with no change AKA "CNC"

this happens because as the item rolls its modifier 75% chance, 25% of that is a socket, and since your shako already posseses sockets your chances are now 50% mod- 25 % CNC- 25% Brick

Boxing before Corrupt is a huge risk due to Brick chance, your risking totally loosing your puzzle box at a 25% chance

best bet is to get desired corrupt first THEN try for sockets with de box

Couldn't have said it better - thank you!