Updated by Chris Stanton Brunt, who has heard or played the organ.
Identified through online information from Chad Boorsma. -- The main organ, located in the chancel, has chambers on both sides, as well as cases with exposed pipes on the front wall. This area houses 75 ranks of pipes. The gallery organ has 17 additional ranks of pipes housed in two cases with exposed pipes on the back wall. The two-manual gallery console plays the gallery organ and can also control the entire organ through the use of "blind" general pistons copied from the front console.
Chancel and Organ Cases: Image from Schantz Organ Company; used with permission. Taken on 2005-06-01
Church interior. Choir loft and cases: Image from Schantz Organ Company; used with permission. Taken on 2005-06-01