We did all the cutting "long" so that we had room to trim more off if needed. We installed everything again to check the fit. I know this will sound far-fetched because nothing ever happens this easy, but everything fit perfect! It's almost like we planned it that way. With a few hands holding everything together, mark across the seam in the tubes to verify their position to each other, and then remove the tubes. We lined up our mark with the tubes on the bench and tacked them together. We reinstalled it and everything still looked great.