I seem to remember back in the day that the Macintosh Portable’s power supply could be used only the Portable… but the PowerBook 100’s power supply (slightly higher amperage) could be used with the Portable.
Is this true? Do you risk damaging anything?
An item like this is for people looking to do a total restoration, and not folks just wanting to slap the cheapest solution on their machine.
This seems like a premium product… so I wouldn’t try to compete with 3M generic.