Thank you for the quick reply. I got a DM back from John suggesting similar. I tried various stages of tightening and then loosening, all leading to similar outcomes of grindy fan. He responded to my vids saying the sounds were not normal. Probably sending a replacement fan. I wonder if there are any other higher quality fans that it could be replaced with if it happens to be a common problem? It honestly looks like the fan casing is warping into an oval and causing issues with the fan blades.

Hey everyone. I just got my FutureBit a couple of days ago. Everything was going fine, until it started making loud grinding sounds today. I put in an email with the contact part of the website and DM'd John on Twitter. I figured I do my do diligence and post here for more exposure. I isolated the grinding to the raspberry pie cpu heatsink fan. Seems like it is a bad fan I guess. Do I need to send the model back for replacement? I'm having trouble finding returns info. =/