I wish there was something readily available like the Microsoft Natural Ergonomic Keyboard 4000 but with mechanical keys. Change the spacebar into two pieces to

I wish there was something readily available like the Microsoft Natural Ergonomic Keyboard 4000 but with mechanical keys. Change the spacebar into two pieces to avoid the need for custom keycaps if you like. Most/all of these fancy split keyboards are missing something, like this Ultimate Hacking Keyboard has no numpad or multimedia keys. I'm currently using a Varmillo 110% mechanical keyboard that has all the fancy keys (music/mail/calculator/My Computer keys, numpad, and multimedia keys on Fn-pressing the F keys). But it's not ergonomic; there's no curve, wrist rest, or option for a negative tilt. A lot of mechanical keyboard options are more for show than practicality, which is a bit sad considering mechanical keys are nicer to type on.