I have had a look at the mantis Q 40, but it is fundamentally flawed in a very, very specific way. Humanware believe, all blind people use standard QWERTY, or whatever layout for their language. Not true. I, Having rather severe right side hemiparesis, use the left-handed Dvořák keyboard layout. I would believe, there are right hand Dvořák layout users as well out there. I have brought this up with humanware, but no go. It really is not that hard.