Fortunately, I was able to replace the angled fitting ...
The order arrived promptly and the assembly fit properly.  However, the angled plastic fitting did not work well for me.  I sleep much of my time on my stomach, which places the mask near the bed's surface.  I think the fitting's angle was slightly different than on my old tube assembly, making it impossible to rotate the fitting so the vent holes pointed more upwards.  Also, the pattern of the vent holes was slightly different and I noticed more rushing air noise when the mask was near the bed surface.<br /><br />Fortunately, I was able to replace the angled fitting with the one from my old tube assembly and all is well.<br /><br />Also, the tube when unextended is shorter than the old tube.  That has no effect on sleep comfort, but I wonder whether more of my breath will get into the main heated tube.  I don't wash the main heated tube as often as I do the short tube.<br /><br />Perhaps the differences are in a new Resmed short tube assembly as well, but next time I'm inclined to pay more for the Resmed part and find out.
Rating: 4 stars