I started building a Petrel and have a question I'm hoping I can get some help with.

I lofted the froms from Nick's book (3rd edition) in ACAD everything seemed to look good. I printed full size forms, glued to plywood and cut out. After I mounted them onto the strong back I checked fair at the sheer line and it looks like one of the forms is off by about 1/8". Has anyone else had this problem?
I checked the strong back and the centeline of the forms with a laser and it looks good. Should I just adjust to get it fair (make sure it's symmetrical) and not worry about it?

Thanks,

David