I would not advise my clients to enter into any deal where the builder has so much control. A housing association group can divide votes any way it likes and in giving the builder so much control, 6.5 votes, he would always override your vote and there is no definition of a "working consensus" in the document, which could lead to more confusion.
The language you have crafted doesn't do anything since under the bylaws you still retain rights. Since one person still has all of the control, you are really getting nothing but the right to spend money if you have to go to court over an issue. If you want to do something, then consider a clause that would mandate impartial mediation in cases where there are disagreements and the irrevocable majority is the only one on the side of an issue to be paid for in equal shares by all sides.
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