I use an IBM Selectric typewriter with correcting tape.
My typerwriter is not really a self-care aid (it is a self-extension)
but it does solve a problem - erasing. Because it is a Correcting
Selectric, I now erase at the touch of a button. Also, an upright
support has been attached to the back so that multiple sheets of typing
paper can be stacked against it. With this setup, I can use my
Headfinger to feed in new sheets of paper as needed.