The software which manages our instrument spec sheets, and the software which manages our field tech rounds.

Thanks for sharing this. I can well imagine that managing field tech rounds is plausible if it is limited to in-house use. I assume that is planning, documenting and scheduling of field trips with a front-end for the planning and some way to show on mobile device or laptop for the tech?

Is instrument spec sheet management focused on storage and presentation, and occasionally updating values such as service interval, calibration dates etc ? If so I also find this plausible.

Both use cases are focused in terms of use case complexity (especially if your company is focusing on your requirements only as opposed to software vendors covering variations), low in complexity in terms of involved parties, and inter-system boundary crossings.

Very interesting. The spec management is probably the higher risk use case, but I assume you have proper engineering review and a tight test strategy to control this aspect.