The fuel tanks come 100% assembled and painted !! NICE !!! all fittings are jumbo sized for plenty of fuel flow capacity. The vent fittings on the main tanks are set up with swiveling festo joints ..NICE !!! Even the pickup lines and clunks are preinstalled ! The tanks are made to perfectly conform to the inner wings, and also provide some further support/structure in the area .. wow, that’s one less set of tanks I have to worry about gluing together