Originally Posted by RV10Man
Who knows what 51% really is?
It's not spelled out specifically anywhere, as far as I can see. 51% of the work for me may not be that much work for you.
51% is a relative number.
The FAA has form AC 8000-38 that is used as a checklist to determine compliance for the major portion (51%) rule. In the FAA's eyes this is what spells out that relative #. The FAA is at this moment in the process of rewriting AC8000-38 so it is likely that things will change.
As for certifying this project as amateur built...I agree with other posts...get every thing you can to help prove no work was done professionally. Best situation would be to develop a relationship with a DAR and have them feel assured ahead of time that all previous work was not done for hire.