I took a shot at the lot a while back. Maybe not my best work but I'm still learning.
Oh cool. I'll check that out and feedback in a reply here since that post has some years on it.
My thoughts:
Not all of Amendments 11-28 should be repealed. The 12th, 22nd, and 25th I think are all important. POTUS and VPOTUS should be a "ticket"; otherwise if we go back to the old system where VP is the runner-up, it will encourage political assassination. The current situation with the "Deep State" is bad enough, if we remove presidential term limits then we can easily get a President for Life installed via repeat falsified elections. The line of succession is important, during any crisis the de jure CIC should be clear. I also like the 20th, we don't need a large lame-duck period but this could be Federal law, doesn't have to be an amendment. I think the 26h should be "repealed and replaced", with something that defines the age of majority. Voting, smoking, conscription, drinking, etc - I don't give a shit if it's 18 or 21, but you should either be an adult, or a child. No 18-21 gray zone.
If you work off the assumption that your 31st does not get ratified (therefore the Federal income tax remains in place), then I would rather see the franchise limited to those that pay more in Federal taxes than they get in Federal benefits.