I've tried every version of stunner and had very little issues. I'm consistently going back and fourth between Milka's CM9 and Stunner.
I second trying the jig. It's just some resistors jumping 2 pins on the micro usb connector. It's cheap, easy and only requires a trip to Radioshack. I've jigged my Epic4gtouch. Look through he reset the triangle counter with a jig. You may gain some flashing insights. I have done some jtag work before too but on routers and cable modems but not phones. Jtag requires a special computer interface and on the note probably requires soldiering to small locations. Nothing about jtag is difficult but does require following instructions exactly.
I second trying the jig. It's just some resistors jumping 2 pins on the micro usb connector. It's cheap, easy and only requires a trip to Radioshack. I've jigged my Epic4gtouch. Look through he reset the triangle counter with a jig. You may gain some flashing insights. I have done some jtag work before too but on routers and cable modems but not phones. Jtag requires a special computer interface and on the note probably requires soldiering to small locations. Nothing about jtag is difficult but does require following instructions exactly.