The cabinet space is 1840mm tall, 690mm deep and 1000mm wide. I want to make the cavity fit the dimensions prescribed in the linked planning doc (https://dam.fisherpaykel.com/KZ3PKN00/at/x9rh3ns3s3rk5v28gx3323fc/FP-PlanningGuide-en-RS90A-RS90AU-RS80A-RS80AU-IntegratedFrenchDoorRefrigeratorFreezer-0-90004832F-NZ-AU-UK-IE-EU-CN-ASIA.pdf).