RE: df-03 makes weird noise when landing???
The only thing I hear when my DI lands is loud chassis slap but that doesn't make a grinding noise. I had a problem for a couple days where the gears made a really bad grinding noise when I was braking. That went away once I opened the gearbox and re-lubed it. Not sure if it was the lube or just a gear slightly out of place.
EDIT: I see you are getting an XBR Set-up. Let me know what you think about it when it arrives. I was thinking of one for my DF-03 but wanted some opinions on it from owners. Don't want to hi-jack the thread or anything; just send me a PM about it or something.