My xMachines Lorei Duo is still my main printer and I had no issues at all despite a fans on one hotend that died on me. I got the dual extruder setup working and calibrated in Simplify3D but never really used it. I think the multimaterial solution from Prusa is superior to a simple dual hotend setup.
Is it worth updating to the latest Marlin 1.x firmware? I am still on my factory firmware because I am not eager to brick this machine. :(
If anyone has the latest firmware for the Dou with heated bed lying around... that would be nice since focus will move to Marlin 2.x and this would likely to be my first and only update. :)
Jens