It's all been said above. Check the log books, ask for the build work sheets, and also ask to see the test flight report (they should have a copy from the test pilot).
I kept copies of the PFA (LAA) blue work book when I built my aircraft. Take your inspector with you on the inspection and listen to what he says and don't be ruled by your heart.
My current plane is on a C of A (ARC) and I miss being able to do the work myself. I have spent a lot of money getting it to how I want it but I knew that when I started. It's more important to ensure you don't get bitten when its on a C of A as you have to pay someone else to sort it out IMO.