I was looking into mixing & matching the Cherry MX switches in my keyboard with other flavors in the MX series. Right now I'm all Blue. I'm wanting to change the spacebar to an MX Green & replace all the "lock" keys with MX Locks. I like the feel of the Blues for typing, but I was considering replacing the switches of function keys, arrow keys, etc. It would be AWESOME if Cherry Corp. sold a numpad with each of the ten MX switches, pretty sure they don't, so I was wondering if you had any recommendations as to which switches you would use for what key(s).