Gordon, i too am looking at the e3 hotend, would like your input on modifications, if any, need to be done with the gmax. Will it be plug and play, doubt it's that easy, but it would be nice. I had a rocky start when i first got my gmax, but things are getting better, working on making the bed frame more rigid, and moving to simplify3D for slicer was night and day compared to Slic3r. Keep up the good work with the post's, Ray and Julia thanks for your posts also, it's good to see more people on here. Really look forward to the dual extruder progress.
Thanks