Either should work.
when the documentation is referring to "Device Name", does it means we have to use the "Wacom Bamboo 4x5 Pen stylus" that is reported by xsetwacom --list or I should/could use the device ID as I did for other xsetwacom test to switch between relative/absolute and play with RawSample
or whatever show you've changed the matrix?
xinput list-props "Wacom BambooFun 2FG 6x8 Pen stylus"
Since you've cloned the xf86-input-wacom git repository you should have 'MapToOutput', or are you using the default Maverick 0.10.8? Because it's not in that version. It got added a little later.