In subsequent years, Len continued to build organs in this amalgamated style. When asked, he would produce instruments with an especially warm or eclectic pallet. He would always deliver,  but it was not his usual preference. As trends in American organ building began to shift away from the organ reform movement, Len did not immediately follow.  His last few new organs were voiced slightly warmer and with less intense upper-work, however they do not surround the listener with a warm breadth of tone that we are accustomed to today. 

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In the early 2000’s, Len completed two large projects which challenged his tonal approach and moved the sound of the Berghaus organ further away from Baroque influence.  Firstly, in 2003 Berghaus built an organ for St. Stephen’s Episcopal Church in Wilkes-Barre, Pennsylvania. In close collaboration with Organist and Choirmaster Mark Laubach, the organ’s tonal design was rooted in the American Classic style. Lush foundation tone, complete principal choruses, and Romantic color stops are found on every manual. The organ is utilized annually during courses by the Royal School of Church Music.

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Secondly, in 2005 Berghaus completed an organ for Queen of All Saints Basilica in Chicago, Illinois. The immense cubic volume of the Basilica’s nave required a new approach to tonal design. Generous scaling is found throughout the organ to envelop the space, rather than sear through it. Considerable warm foundation tone provides for the accompaniment of Catholic liturgy and performance of a myriad of repertoire.