Hi Zayfox and oberonking,
The Waltop tablet ID's were just committed to the xf86-input-wacom repository by merging the Waltop branch. So progress!
Not sure if that will make a difference. But since it looked possible from the Xorg.0.log that it was xf86-input-wacom, rather than Ayuthia's modified wacom.ko, that wasn't working someone should test it by cloning the git repostiory.