Exchange Ctrl and CapsLock on Mavericks

I got Microsoft Natual Ergonomic Keyboard 4000 US key layout version. I use this a couple of day and begin to think that I would like to exchange CapsLock and Ctrl. CapsLock is left side of A, and Ctrl is left and right bottom. I never type right bottom ctrl ever and maybe in the future, so I can ignore this key. But I type left bottom ctrl more than 100 time everyday, and this is a little bit hard.

Mac OS provides us to change some meta key, CapsLock, Ctrl, Option, Command. The step is below.

1. Open System Preferences
2. Click Keyboard
3. Click Modifier Keys...
4. Re-Select keyboard if the keyboard I would like to change keys not selected
5. Change Caps Lock Key from "Caps Lock" to Control

I never use Caps Lock key, so I changed only Caps Lock. I define Control key as Control.

I know this configuration by US仕様のキーボードのMacでControlキーとCaps Lockキーを入れ替える方法 / Inforati, thx!