So Prusa and Prometheus currently have similar systems in the pipelines:http://ift.tt/2eQPIjh anyone unaware, they basically retract the filament completely out of the hotend and have a Y split/merge in bowden tubes to let another filament unretract all the way into the hot zone.I don’t want to preorder and wait or pay ~$300 when really all I need is that Y junction. Anyone DIY it yet?The Prometheus has a special (black) ‘bowden’ tube that helps prevent filament from jamming in PTFE tubing (from being a little thicker where it melted). Where can I get something like this? Anyone know what Prusa’s system uses?I’m currently using RAMPS with Marlin, running in EEB with an E3D Chimera. How do I get both tools to use the same hot end heater/thermistor? http://ift.tt/2dQpL0x