The turbo head on my DC-23 is having difficulty spinning, and I am guessing it has something to do with the drive turbine. I have taken the cover off and cleaned the brush and made sure that the suction path is clear, but this did not solve the problem. So I dug deeper, removong the torx screws holding the clear plastic part of the assembly. There are then 3 more torx screws holding the drive mechanism together - 2 are easy to remove, the third is visible but at a right angle to the hole near it, making it very hard to remove. This is where I am stuck - is there a special offset torx driver (like the hex head ball drivers) or is there some other part that comes apart so I can fully clean the drive.