Sometimes I will vary an adjustable DE setting for different areas of the face. When I use a non-adjustable DE, I find it is possible to adjust in a different manner, by experimenting with angles and pressure.
I also have a Gillette 1904 replica DE razor. The price was a very affordable $25 or so when I bought it. In most of the ads for it they do not indicate that it is adjustable, but if you slightly loosen the screw-on handle, the blade becomes more agressive, and there is no wobbling problem caused by the blade or the handle being too loose. It can be adjusted this way to several different settings without anything becoming too loose or wobbly. The 1904 replica does not have any knobs or dials for adjusting.
The 1904 replica requires you to take the handle completely off of the head of the razor, and the head comes apart in two pieces. You insert the DE blade the way you would place a slice of lunchmeat between two pieces of bread. It is a little more work than a modern butterfly door razor, but I was curious to try its 100 year old design. It gives excellent shaves.
