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What type of hot end are you using on the Rostock Max? Is this the hot end you sell or a variation of it? It's hard to get a clear image of what you're using and it looks like it's mounted to some custom brackets on the platform.

Yes, we are using our hot-end, the only change is that the top of it is drilled and tapped for the push-to-connect fitting for the bowden tube, and the extruder has an adapter with another PTC fitting.