Due to the delays on the Metal Ubis, I was looking into the E3D adaptations. I found this well documented resource :
http://thisoldspoon.blogspot.fr/
Since I'm a bit shy, I might just go for the version with the PB thermistor : saves time if I revert back as I won't have to reprogram the board again.
Sure, there is the question of cost, as the metal hot end from PB should be less expensive (though with postage to Europe that's debatable).
Anyone tried it ?