I’m a little confused by your ‘Drag a .nki or sample etc to the main panel’ comment. I picture the nki as ‘the patch’ and containing info on where the samples are and how they are laid out etc. Can you drag an individual sample to the main panel?
The other confusing thing is when people move nkis or exs files around (e.g. to put them in Logic’s library) as they often move the ‘patch’ and not also the folder with the samples in. I assumed the patch would lose track of the sample location?
For my music I prefer the PianoBook samples to commercial samples very often… credit card is whipped out less often these days. Decent indeed!