Not sure you understand what I am saying by operational memory.
That is the memory holding the operating Puppy OS and all the stuff that completely makes it operate.
All the needed hardware support files, the core operating files, and programs.
Everything needed to get to a working desktop and then do stuff.
If you first boot and get to a working desktop. Do nothing else.
That is what I call operational memory in use.
OK using nocopy will still require loading in memory what is going to access the SFS's and un-compress and load stuff into memory when requested.