Finally getting around to posting this thread after much discussion in the Shoutbox while I fumbled around with settings and cleaning things out over and over until the extruder and hotend fit together well. Basically, it was a shaky start, but I think I'm finally at a spot where I'm happy with my Robo and how it's running. I'm using Simplify3D, the E3D v6 hotend mentioned in the title and a somewhat-more-modified Greg's Wade Extruder (the one that came with the Robo). I reamed the thru hole for the PTFE tube that feeds into the hotend to be 3/16" (.187") instead of the 4.2mm (.167") from the E3D Modification thread, and also drilled the same size hole in the top of the extruder where the tensioners hold the filament in so I could install what I've been referring to in the Shoutbox as my "halfass Bowden rig". The wider hole in the part of the extruder being held closed by the tensioners is to accommodate more PTFE tubing that (starting with the Z-axis at the home position on the bed) reaches about 3" thru the slot in the top of the printer. What will happen as the extruder moves up is that the PTFE tube will ride up the filament being used and coil around the spool (this may or may not work very well with filament spools that have nets around them like T-glase, haven't tried it yet). As of this posting, the Robo is printing a scaled-up Aria Dragon (scaled to basically fill the Z-axis traverse on the Robo) as a test of this setup; it's at 90% in Sky Blue PET+ material. I'll add a post with a pic and the settings used once it cools off and I take it off the bed (and the rest of my posts in this thread will basically catalog successful prints, materials used and settings for the given print).