This paper explores the tuning and results of two-part models on rich datasets provided through the Casualty Actuarial Society (CAS). These datasets include bodily injury (BI). property damage (PD) and collision (COLL) coverage. each documenting policy characteristics and claims across a four-year period. https://www.roneverhart.com/HP-15-fc0093dx-15-6-FHD-Laptop-AMD-Ryzen-5-7520U-2-8-GHz-AMD-Radeon-16GB-LPDDR5-256GB-SSD-Windows-11-Home-S-8F1A6UA/