YES!!!!!
It appears the owner has agreed to split the difference, agents are working on an addendum to the contract for the new purchase price.
This means I'll still be able to do 20%, not pay mortgage insurance, get the better rate, and on a smaller loan at that.
The figures I got from the bank yesterday on this scenario were for a monthly payment of about $432 including taxes and insurance.
Good grief send me that addendum to sign and let's DO THIS THING.