This little recorder is just crying out for a dedicated plug-in stereo mic. There has been discussion on several forums about this idea. There is the CEntrance PM1 mic set (less than 200 bucks) designed for their own recorder. They will fit the F3, but due to the orientation of the XLR plug, you can’t get an X/Y orientation, just an A-B. Also, the PM1 has a self-noise of 20db(A). Comparing that to the BP4025s 14db(A), you will hear more noise (hiss) in the background. Whether this is acceptable will depend on how quiet the source audio you are trying to capture is. 20db(A) is too noisy for nature recording, IMHO. Maybe some company will make a stereo mic head with low noise cardioid capsules like the 4025, plus an attached pair of XLR connectors that fit the spacing and orientation of the F3, creating a compact unit. I’m sure there will be some DYI mic designs showing up, given some time.