M00(Load Tool #25)
The problem is what to do about tool offsets.
You could choose your tools for manual change carefully.
Like tools that don't need to use diameter compensation such as Drills and roughing endmills.
Also make sure the tool length offsets of the choosen tools is less critical.
You need to offset the tool length by hardcoding the actual length within the Nc-Program.
Or use the actual length from within your Cam Program.
Instruct the Opperators to use exact tool length callout to make this repeatable to replace worn or broken tools.
A little more work but doable.