My BigBox has been sitting idle for over a year now and I want to get it back up and running and upgrade it. I've been reading through a lot of the topics on this forum and searching new mods and hardware upgrades. I'm still unsure about a couple of things that I'd like to get feedback on to determine how I'm going to upgrade the BigBox. I have the BigBox dual from the Kickstarter campaign. After I received it I printed with it for a while but I got frustrated with continual need for manual tweaks and adjustments. I usually got it running and could do 2 - 3 prints before the leveling was off again or some other issue came up. The last print I did with it failed and damaged the extruder carriage as plastic balled up under the nozzle. Honestly I had less trouble with my Prusa i3 MK1 that is also all manual than with the BigBox. Recently I got a Prusa i3 MK3 and that has been performing like a charm. I have made dozens of prints with it including 24hrs+ ones without a glitch. I was astonished by the progress made in auto calibration, auto bed leveling and overall performance. That made me want to get the BigBox working again and see if I can get it at the same level of performance or even better. So what I'd want to achieve: Dual extrusion Auto bed leveling Live z-adjustment. Very useful on the i3 to get the z-height adjusted just right Silence, the BigBox is loud. The i3 is really silent and can run when I'm around without a problem Detachable flexible bed Print quality at least at i3 MK3 level I'm happy with the V6 extruders just didn't get the dual extrusion working. That I'd want to get working now so I can print supports in soluble filament. I've seen the Titan Aero extruders and they are nice and compact but I don't know if they are worth the upgrade. Is their quality much better over the V6? The manual bed leveling and adjustments with the BigBox worked but I needed to re-do it every 2 - 3 prints and having to manually determine if the nozzle grips a piece of paper just right isn't really reliable. At least not in my experience. With the i3 the combination of the auto 9 point bed leveling using the inductive PINDA probe and the fine tuning with the live z-adjustment makes for very good first layers. I'd like to be able to do that on the BigBox. That's the second question, is it possible to do that with Marlin and the original RUMBA board? Could I use the IR-sensor or would replacing it with a inductive probe make sense here? Prusa has their own fork of Marlin with their additions that are not always merged back to the original Marlin firmware. If not possible would a Duet Wifi solve this? The Duet would add new stepper drivers that reduce the noise coming from the stepper motors. For the RUMBA I could get new Trinamic stepper drivers which would be a cheaper option to do. Are their any other benefits of replacing the RUMBA + Octoprint combination to the Duet Wifi? I'll be replacing all the fans with Noctua fans to reduce noise coming from the fans. For the print bed I'm considering either the BuildTak or Clever3D plates. BuildTak makes a nice magnetic detachable bed but I'll have to check if they have the correct size needed. Any arguments why one is better or any other alternatives to these two I should consider? For now I'll skip the mod to the IDEX configurations. I don't think that is useful with my use. Any other upgrades I should consider? The lead screw motor for the z-axis?