Here's my first two color print from the E3D Cyclops driven by two BondTech QR extruders. Up until I got the QR extruders last week, I was unable to get a complete print (using modified, geared stepper ezStruders). These photos are a testament to two great pieces of kit: the E3D Online Cyclops hot end and the BondTech QR extruder. For this print I took a guess at slicing parameters. I couldn't be happier with a first effort. This bronze colored PLA filament is very picky - it shows every extrusion flaw (something to do with its reflectivity I think). The part in hand looks fantastic. I used KISSslicer on this print with these settings: KISSslicer 1.5 beta 2.20 on OS X printer on a Lulzpot Taz 4 printer with a Cyclops hot end and two BondTech QR extruders. 1.75mm PLA filament. Here's the basics: .2mm layers .4mm extrusion width (.4mm nozzle) 3 loops/perimeters printed inside to outside .6mm skin 33% straight infill 3mm prime and suck (retract)at 25mm/s 5mm wipe 205°C temp / 55°C heated bed on PEI print surface Printed at 40mm/s, first layer at 22mm/s No extra retract for filament change since that can cause problems with the Cyclops as I discovered with trying Simplify3D (which by default did 12mm retract and caused the Cyclops to jam after 3 layers every time!). I think that's it but feel free to ask if I missed something.