This may disappoint you but in terms of complying with Strata Law, including with not being able to “do” certain things at your block without a consenting “vote” by your Owners Corporation, you derive absolutely NO advantage from owing 66% of the total lots in your Plan.
Your only advantage is that when votes are taken on matters included on the Agenda of General Meetings in accordance with Strata Law, if all Owners are present either personally or by proxy then you can exercise 66% of the possible votes and may thereby control what matters pass and which fail.
Be careful with exercising your controlling votes though, as any other Owners who believe that your votes at a General Meeting have been used in a way that unfairly disadvantages them can seek Orders in the NSW Civil and Administrative Tribunal to have such decisions overturned.
THIS publication by the NSW Office of Fair Trading gives an excellent overview of how NSW Strata Law operates.