Does the LNBF on the D300 have the DP logo on it?
If yes, then stacked with an LO of 11250/14380
if not then you might want to try setting the LO to Standard/Single and 11250
Usually when I'm aiming and I get Quality on 12370 R/V and no picture on NASA, that means I'm on 110W
The lightbulb came on.
You got NASA quality, but nothing on ION while stacked.
So set it to standard 11250, and check again. I would bet that it works now.
If you have nothing on NASA, I think you need to peak some more... just my humble opinion.