Sizing versions
Multiple files can carry different chamber targets, O/F assumptions, units, or feed boundary assumptions.
RPL vs spreadsheets
Spreadsheets are useful and familiar. RPL Engine Workbench is for the point where spreadsheet-based sizing starts drifting away from geometry, warnings, reports, and review artifacts.
Pain point
Multiple files can carry different chamber targets, O/F assumptions, units, or feed boundary assumptions.
Geometry can be rebuilt manually after the sizing file changes, creating another place for mismatch.
Manual report updates can omit warnings, stale assumptions, or the actual solved case basis.
New team members inherit files without always knowing which assumptions are current.
Connected workflow
RPL keeps sizing, injector/nozzle workflow context, DXF exports, reports, warnings, and supported Flowfield visuals connected to the same solved case.

Use both well
Use them for quick notes, independent checks, budget tracking, or custom calculations your team already understands.
Use the workbench when sizing, geometry, warnings, reports, and exports need to stay tied together.
Keep safety review, test planning, export-control review, and qualified engineering signoff outside the software claim boundary.
Evaluate fit
Download the built-in trial and test the workflow on an Apple silicon Mac.