has anyone heard of Atlona or tried these mounts for the HTM-200?

http://hdstep.com/product.php?produc...cat=286&page=1

Due to less than ideal surround placement I need to rotate amost 90 degrees sideways (so the speaker's side is almost flat against the wall) and close to 30 degrees down. If anyone has a cheap suggestion that preferably would not require drilling into the speaker I would appreciate it.