Began trimming left center baffle and plenum for fit. Several iterations to ensure little gap at the top where they meet. Trimmed left center baffle where it interfered with the front of engine. Lots of moving parts. Worked on lateral error of left diffuser by removing diffuser and and front lower baffle to redrill holes. Finalized position of left center baffle, plenum and left inlet diffuser. Drilled vertical holes between left center baffle and left diffuser. Struggled clamping and locating holes due to angle and location of fasteners.