I wasn't meaning to belittle your works Greg, apologies.
To your below posting, yes I fully understand their engineering realted usage and intention of usages to aid in servicing and preperation for service usage of the manuals.
It was the rarely likely hood of combining the immaturely improvised mix of created anacronisms of SBD to the context of the manuals secondary title usage in a phallacously inuendoed manner, again my apologies.