Qidi X-Plus & X-Max Carriage BMG Extruder & Dragon or V6 Hot-End Mod

***Update - Eitri 3D has made a series of videos on this mod upgrade. It's another option for those thinking about doing this mod, especially if you are more of a visual learner. The first video is available here: https://www.youtube.com/watch?v=ybTcS1KZIGg&ab_channel=Eitri3D Thanks Eitri 3D! ***Update - Added a Fan_Duct_5mm_Back.stl as an alternative to the OG fan duct piece. This moves the blower fan vents back 5mm towards the back of the printer. In testing, it seems to have better cooling performance. ***Update - Shaun Farmer from the Qidi 3D FB group was kind enough to create an assembly PDF complete with pictures, so I've uploaded it to the files section. Thanks Shaun! *** Update - I've made two remix versions of this mod for printing in resin. For FDM printers I'd recommend the files on this page with the heat-set inserts. The remixes are available here: https://www.thingiverse.com/thing:4546836 - Nut version https://www.thingiverse.com/thing:4563185 - Threaded version ----- First of all, this is a remix of “qidi x max - bmg & and v6 upgrade” by jhenrikb. Too many modifications to mention them all. Thanks to the original poster. :) This is a new carriage and hot/cold end mod for the Qidi X-Plus and X-Max printers. This was originally published back in November of 2019, and a massive overhaul was done and posted July 4th, 2020. All the original files have been removed and replaced with the new version. Thanks to Bob Martin from the Qidi 3D Facebook group for his help with testing prototypes and giving measurements and feedback to get the X-Max version to fit properly as I own an X-Plus. The bottom fan duct and belt clip pieces are universal, but there are separate carriage and top frame pieces for X-Plus and X-Max. If you have printed/used the first version, this one has the following improvements: 1. Better printer bed/inside frame clearance. The printer nozzle in this version will line up slightly different th