I doubt it's the coolrunner TBH. It's either a very stubborn jasper or a solder issue somewhere.
If i get time tomorrow ill re-do the hole thing with new CR and new wires, new solder.
Im sure its not my solder, have bin soldering since PS1 and made tons of PS2, xbox, xbox360 dual drive-mods (hitachi) so im confident that my solder is ok, have re-solder all once before, but il give it at shot with all new tomorrow if i can get the time.
If its still a no go then i flash back the original nand and let it be original for now.