This method looks very promising. I have a 2 jaspers arriving next week that I'm going to try this on. after reading the posts, I have one concern.
I noticed a couple people on this forum say you should update existing jtag wiring using this method if you are having problems. Should I still do this if my boxes are working fine? I've only had 1 of 3 show strange green lights one time, but other than that, they are all flawless (never had e79 error). I dont understand everything in the Xbox 360 SMC I/O Config Utility pdf, but (Correct me if I'm wrong) it seems like the smc method dissconects the SMC when the 3.3v travels through it? Since the old wiring method doesn't do this, can this old wiring potentially damage the box over time? If so, am I correct that I should update all old wiring to prevent possible future damage?
I used this wiring method on my falcon:
http://boxxdr.com/boxxdr_jtag.jpgI used the standard wiring for my other two xenons.
If you are not getting any error's then you are probably just fine to leave things alone. Personnaly I updated all of my xbox's to use this new wiring. Both methods i think are electrically safe to use but the transistor method does disconnect once the payload is injected so it is by far the best. And of course using aud_clamp eliminated any ROL issues.