On this Paul Cochrane Tim I installed an internal switch for various clipping options.
Now you can choose between the following clipping options:
Symmetric/ asymmetric, LED, MOSFET or silicon.
Thereby, you can alter the headroom or rather the compression.
While the LED clipping emphasis the lower mids and thereby sounds a bit wider, the sound of the silion clipping is somehow more compressed and more aggressive.
This mod can be done on almost every overdrive pedal. On the one hand, it extends the sonic range of your pedal, on the other hand, you will be able to customize the sound even better to your very own sonic ideas.
Just ask the Dude.