Very interesting your insights, so learn all that is at last within our intention, however I do not think Ernst Röhm inscription was made ​​with a dremel machine, if it had been the result would have been much more aggressive with the blade and not what it seems ...
Almost 80 years ago as more of a publicity stunt than a practical application, a U.S. company using one of its pantograph engravers took a two inch diameter 300 character text template and reduced it to .005 of an inch with a letter height of .0002 of an inch. A reduction ratio of 400 to 1. With my point simply being that the accuracy of any kind of a rotary cutter is more dependent on what is controlling its movement - rather than on the mechanism that is actually spinning the cutter. FP
