Even though it is not an adjustable I'll post some pictures of my Gibbs No13 since it is just a really cool later model design.
The Red background is what I started with - the Blue is where I have ended. Yes it does take non-modified blades and yes no Gibbs razors were damaged (by me) in the process. Yes it also over-clocks as well. How does it shave: It feels about 1 setting more than a standard Gibbs, which just may be my imagination. Other than that - It shaves Just Like A Gibbs