What Crawford and Papp accomplished can be compared to an artist like James Taylor ordering a guitar and asking for customization. The changes may be like substituting a different wood for the body or using different strings or other modifications to tailor the guitar's tonal characteristics.
Papp used his technical expertise to implement Crawford's vision for the Wurlitzer's tonal ensemble. All of this work occurred after the Wurlitzer installation work was completed. The New York Paramount Wurlitzer was the only instrument that Crawford and Papp customized.
After Crawford left the Paramount, Papp stayed until his retirement and was a consultant for the Wichita Wurlitzer installation. He passed away before the Wichita premiere. After his passing, Papp's widow, Teresa, sent his tools to Wichita to finish the Wichita Wurlitzer's installation and to be used to maintain the instrument. Teresa was in Wichita for the premiere and a short time later moved to Wichita to be with her new Wichita family. She lived in Wichita until her passing.