So if you had it that generate drumkit automatically resolved every key this would then be ready for any samples that are added at a later date, and if you changed your base note this wouldn’t be messed up later…
It would be nice to shift the basenote to a different position for the kit than just plain C-4.
But with all the stuff being saved as XML in the next edition, you would be capable of writing such tool on your own.
I already tested it by writing an automated Renoise Instrument generator, just drag and drop a rootfolder with samples (inside subfolders) onto the tool and it automatically creates an instrument file per folder or per set of files that you dragged upon it (and automatically generates a drumkit at basenote of choice).
I don’t know the .rni format though, so couldn’t adapt the routine to make it work for current public Renoise version.