Following the below
See, I was just following a logic trail, trying to understand an argument.
So, no matter the size of the constituency, they will only need to be adjusted by up to one quota at a time - i.e. one average number of voters to seats. In practice, that means up to about half a quota adjustment per constuency. This is an absolute number, that doesn't change.
What does change, though, is the distriubution of the surplus/deficit. i.e. for those parts of the constuency that cannot be equalised to the quota of voters.
In a one member seat, a half quota means adding or removing half the voting strength for the electors of one candidate. In a two member seat, thats a quarter per candisdate, and three members, is 0.17 - one third of one half. i.e. you can distribute the differences among candidates within a mulimember constuency.
Sorry for being dim.