Great image Bob - as already noted.
If I read your technical detail correctly you are using an 830nm filter and a Nikon 800E. From your exposure details I am guessing that the camera has been modified. Correct? If so, did you encounter any issues with IR components as used for AF by the camera itself? Some Nikon DSLRs had such issues - IIRC some of the D7*** DX cameras.
Thanks in advance.