Jimmy-T in your example, with 40 for, 40 against and 20 abstained, the motion would still fail though, right?
Depending on the unit entitlements, yes. But in that situation, someone on the “losing” side would surely call for a poll vote in which UEs would be counted. And according to the Act (but not the chair of my building) you can call for a poll vote at any time during the meeting, whether the chair has declared the voting closed or not.