I also made a test piece when I finished the last glued piece. once everything has dried, I will tear them apart to see if the glue held and the wood tears. if one of the test strip fails, I'll scrap the rib and try again.
One of the problems with Resorcinal glue is that it stains the wood a purple/brownish color. I tried masking the unglued areas like painting a car ... but I still stained the pieces I had to handle. I am now out of Resorcinal glue, so I'm gonna try T-88. look at the difference with & without masking tape on the build.
