If you have me come out and then decide to do your own repair. You only paid for a opinion because I dont know exactly what you did only what you say you did if it dosent work. Not that people ever lie.
If you have me do the work now I have to stand behind the diogonistic and warrantee my work. If you do it yourself you only have yourself to blame. If you have a pro do it now it there fault. I dont mind DIY and I even get into DIY out of my field but just like on this forum there is no guarantee you will get the result you want. If you want the reward of saving money you also have to take the risk. My2cents