Fancy Product Designer Multistep Product Configurator Another
from what I gather, currently only "backspace" for deleting works.
users tend to also use:
1. del (delete)
2. ctrl c (copy)
3. ctrl v (paste)
4. ctrl s (save)
5. shift (while moving, rotating to move in defined jumps)
* aside from number 5, all functions already exist in this great designer.