When you say open all the way you mean #6 correct? you know you can keep on opening more right? I shaved with mine on setting #10 and I decided never to do it again because it didn't felt right, didn't cut my self but just felt wrong.I have both the 2011 R41 and the chinese Futur clone. I use the latter wide open and it still does not shave as close as the 2011 R41 based on how long the BBS shave lasts. It does expose more blade at the edge and does not forgive any mistakes, but despite that is not quite the equal of the 2011. It is fun to use though because it is sooo loud.
Must get me a Tech to compare.