Lol, i am electronics technician, so i repair/change Ti-chip,I do not want to break the warranty...
you will lose the warranty. But so long as you know what you're doing you wont need it. 
*high five* I'm an electronics technician too.Can I still attempt to mod the two new boards? If so, I don't want to move them much because they are already running high. But do have very good cooling, 4 fans on 6 cards.
Thoughts? Input from the wise men?
Iirc some where reporting problems when mixing old pencil modded cards with modded new ones. I'd say do it Thoughts? Input from the wise men?
you can always clean the grphite off if problems arise.