I currently have a Wacom Cintiq attached to a LX Desk Mount LCD Arm, Tall Pole 45-295-026 and I would like to know if I can attach a LX Wall Mount Keyboard Arm 45-246-026 to the tall pole. The diameter of the arm's hole is not listed on the dimensions sheet. However, I can't imagine it's different than the monitor arm. I would just like to slip the keyboard arm onto the tall pole, is this a problem? Thanks!