Since this forum has taught me so much, and given me so many awesome effects, I just went out and bought a Distortron and cracked it open so that I could investigate the implementation of the Hi/Lo and Subs switches for you guys.
If you look at the AWESOME schematic of the box of rock in the other thread for reference...
-The High/Low switch shorts out the 330ohm resistor connected to the 3rd mosfet. I dunno if I can say this is verified, but I traced it to be this, and I run my continuity checker on the 330ohm resistor with the switch in both positions. When the switch was set to Hi, my meter told me that the 330ohm resistor was shorter. Good enough for me!
-The Subs switch is a spdt on-off-on switch.
The switch is connected to what WOULD be the 1uf coupling cap that connects gain stage 2 to gain stage 3, but this cap is cannot be 1uf any longer. I don't know the exact value. But in the center position (subs 1), it is just 1 coupling cap. Positions 2 and 3 each add in a different value capacitor in parallel to the coupling cap. Zvex says that position 3 is the stock BoR setting.
Using everything that we know, I'm going to assume that the coupling cap between stage 2 and 3 on the distortron is .47uf, and Subs 2 adds in a .22uF cap, and Subs 3 adds in a .47uf cap. I
I'm assuming this because .47uf in parallel with .47uf is close to 1uf, which is the stock box of rock coupling cap between gain stages 2 and 3. And adding in .22uf seems like a pretty decent halfway point.
I hope this clears up some of the confusion for you guys! Thanks again for everything!!