Don,
ABS filament brand: SeeMeCNC
build chamber temp setting: 70C (actual 60-70, controlled and elevated chamber temp is required to prevent severe ABS warping)
build plate setting: 70C
extruder temp setting: 220C
controller: RAMBO board that came with the Rostock MAX kit (also Arduino based)
Heated build chamber is essential to ABS printing. Went with 70C goal as SeeMeCNC forum posts suggested that much more than that could stretch the rubber drive belts.
Cooler temps prone to causing a lot of ABS part warping.
I know its a PITA, but highly recommend building a chamber similar to mine.
ABS cuts and sands like wood but better (no splintering), is the most temp and shock resistant material that can be practically filament deposition 3D printed.
For rocketry related 3D printing, ABS and heated chamber are extremely desirable.
My take on the Cyclops is that it is in beta. The heated chamber improves ABS print reliability, Cyclops offers great potential options but frequently reduces print reliability.
The Cyclops is very interesting. It offers the option of dual colors or using support material. E3D makes very nice stuff.
The Cyclops must be loaded with filaments in both inputs at all times.
If both filaments are under some extruder driver pressure anytime one filament is being driven, then all is good.
If one filament is being driven into the Cyclops when the other filament is relaxed or not present, then the Cyclops will backfeed filament = dissaseemble Cyclops and Acetone clean.
Only had to do this once, 1+ hr to do. Careful attention to every setup can prevent the need.
Using Mattercontrol to slice 3D shapes into printer instructions as this was supplied with my kit and the user interface is very friendly.
Most of the time it works fairly well. Regarding dual extruder setup, it is in beta mode.
Shell wipe function does not work. Tower wipe function does execute but requires a lot of sacrificial material.
All of my dual material printing has been ABS (part) and HIPS (support for overhanging part shapes).
Sometimes producing parts I could not otherwise make*, and more often printing more scrap :eyeroll:
* Camera covers for onboard 808 #16 video cameras on flights 300-800+mph