My hubby and I just got our R1+ last week. When we took it out of the box, the hot end was hanging loose. We reconnected it and managed to get a couple of small things printed (several failed prints). Then the thermistor wire snapped in a place where we can't get it soldered back on. We contacted the customer support and are hoping they send a replacement part, but in the meantime, is there any thermistor we could get and use?