Monoprice Select Mini Rattling Issue

Hey folks, hope you can help...

I'm getting a rattle on my MPSM, and it only seems to happen when it's printing on the right side of the bed. See my video:

https://www.youtube.com/watch?v=LCfFnx25MnI

Can anyone help me assess why this is happening and how to fix it?

Attachment 10388

Sorry I'm no help, the video won't load (that's on my end right now, I'll try later), but I couldn't resist.