Help Me Understand the Clipping Configurations I've Created on this Pedal

[drumnbum]

I've been modifying my SD-1, and in the FBL, I've got a switch that allows the following diodes for D4:
Position 1: Two red LED's in series
Position 2: 3 Ge 1n34a's in series

On the other side, in parallel, in D5 is the stock diode (1n4148, I believe?) and D6 has a 1n4001. 

I enjoy the way it sounds, but I want to fully understand what kind of clipping I have here and if, due to the D4 diodes in series, having a higher vF, anything seems "off" or redundant/not necessary in this configuration. 

Any feedback (no pun intended), is roundly welcomed and appreciated!

[induction]

Schematic?

[drumnbum]

Unfortunately I don't have a schematic.  But the orientation of the diodes is the same as the stock configuration, if that helps. 

[Groovenut]

You've increased the Vf clipping on one side of the waveform. 2 LEDs in series will give a Vf of ~3 volts, 3 Germs in series will give ~1.6 Vf. With 2 LEDs in series you might be getting close to clipping the opamp rail. If it sounds good, it is. I dont anticipate any harm coming from your circuit due to the changes you laid out in your post.