RE: Sig Citabria Build
The fourstar did not use capstrips. This is the case with many quick builds. There is nothing wrong with either method. The cap strips do offer a stronger rib assembly in that the method produces a type of I-beam in the rib. It also gives a little better support for the covering. You do not want to omit the capstrips, as they are needed to bring the ribs up to the heigth of the leading and trailing egdes, top and bottom. Study the plans carefully and you will see them drawn on the plans.