The Repairman's Certificate is different
It does depend on your inspector of course but evidence of you building the airplane is more the heart of the question when it comes to approving you for a Repairman Certificate for the airplane. This comes later in the sequence of doorways to freedom to fly, maintain and perform the annual condition inspections on your airplane. In the FSDO at Long Beach they were very interested in the written builder's log, the photos and my presence in them doing work. They (several people) read the pages corelated the log with the photos and questioned me about them. They told me "you wouldn't believe what some people bring in here claiming to have built an airplane." You may run into a more casual FSDO employee - really I hope not.