I have also suffered the issue of the fan support snapping on the X carriage. I super glued this and was planning on printing a replacement today. Unfortunately my overnight print resulted in it breaking again and taking the z height sensor mount with it I have super glued the sensor mount back and will likely not bother with the fan as PETG doesn't appear to need it. My first question is, what settings (in particular infill) have people been using to print the parts? I think the only support material needed for this part is where the belt tensioner goes - can anyone else confirm this? The big issue however appears to be that with so many people suffering from the same failure, can we get access to the native files so we can try to create a better alternative (or will the Bigbox team release another version)?