The Hard Brick eMMC problem exists on most notes (whether stock or modded - but only for ICS not GB) its a command that has been more or less confirmed by the xda boys. There are 2 maybe 3 Safe kernels that disable the command in question. I myself used dr.ketans guide back in mid May to load the Official Taiwanese ICS release & root my Note. Had no problems there.... but got bored with that, so I flashed speedmod's kernel (safe) via PC Odin. It did however clock up my custom flash counter (Yellow Triangle). After a few days of that, I decided Stock ICS was ok, but wanted something new. Did the following:
Flashed Abyss Note 4.2 kernel, went to advanced, did 3 wipes, then flashed ParanoidAndroid and rebooted. Everything works 100% also I had forgotton to flash gapps, but did it after.... again all works lovely! Ontop of that, I downloaded "Triangle Away" from Chainfire on the xda forums (its free for registered users, otherwise you need to buy it from the play store), I ran it and it resets the counter and gets rid of the triangle... So all is good!