Mistress Charlotte's machine

This is a real spanking machine and very effective it is too !
Owned by Mistress Charlotte in the USA.
There was a video on the site last time I looked....
It is different to other machines as the spanking is done in a vertical plane down onto the buttocks. I am told that the victim is held very tightly so that the blows fall on exactly the same spot each time.
It's this that makes it so difficult to withstand.