I will not create 1100 sounds and 77 kits.

I will start with ... drums, bass, piano, epiano, sax, brass, flute...
Not tons, but very good quality.

If all drumkits in roland can be swaped, it's a good thing.
That mean that I only have to do one mapping to be Roland style compatible

Most of drumkits use the same sounds, but only changes some snaredrums, etc...