Kernrechtsfrage
Whether the appellate court's factual findings were arbitrary, especially on alleged interim invoices and approved measurements.
Extrahierter Entscheid
The challenge was merely appellatory and did not show that the appellate court's assessment was manifestly untenable.
Extrahierte Begründung
The Federal Court is bound by the established facts unless arbitrariness is shown; the appellant only argued how evidence should have been weighed.