Didn’t know there was a funny K5000 mod sold, which is basically a doble K5000 with the S-Version Controls and the W-Version added. Ad you might know, the K5000 is the most advanced addivive hardware synth made (beside the acxel / axcel 2). It’s not a mod, it’s a real product.
UPDATE: This is a mod, no official version!! so this thing has never been sold officially by Kawai atc. But the Yamaha one did:
On the same site: Find the FVX1, the early 8OP Yamaha FM Synth as organ here, too. so looks like they secretly put out organs based on very special and interesting synths. well, I didn’t know and I thought I…
Check it here: Sound Examples.