How do Surveyors feel about Survey Affidavits?

Well, they take business from us. That's a clue.
Here's a discourse on how we feel.( Not on what you should do. )
If you're selling your property, and you have an old survey, you may be asked to sign one. It says that there have been no changes since the old survey was done. Also perhaps that you accept all responsibility for "all matters that a full and complete survey would find." Notice that it doesn't say "any changes since the last survey. You take all responsibility off the old surveyor. I can't tell you what to do, but I'll bet your insurance doesn't cover it.
If you're buying the property, you may be asked to accept the affidavit of a non-surveyor for a survey matter. Check his insurance. He can't give you back a dime if he invested every dime in his next house as stupidly as he did the affidavit.
If you're re-financing, you're the buyer and the seller, so you might as well take the cheap way out. You're re-financing for the money, right?
Please note: Most people can offer advice on getting loans, if they don't represent themselves as loan people. But you should listen to the people who offer the loans. More importantly, the discussion of legal tactics is the practise of law, and no-one other than a qualified lawyer can discuss you're legal position with you. Nothing in this section is meant to infer that you should do anything other than consult a lawyer.