The UL FSRI recently completed a series of experiments looking at the safety, fidelity, and exposure of live-fire evolutions in acquired structures. This series was completed in the same structure utilized for the previous research studies on horizontal, vertical, and positive pressure ventilation, which allowed for a comparison between synthetic furnishings seen on the modern fireground and wood-based training fuels allowed by NFPA 1403 in live-fire training. This presentation will discuss the findings and provide insight into how instructors can design live-fire evolutions in acquired structures that closely replicate many aspects of the modern fire environment, all while working within the confines of NFPA 1403.