D70 non dedicated flash bonous!

[mdmc]

I have just found out that the d70 flash syncs perfectly ( I think) at 1/8000!!! And all shutter speeds with my non dedicated flash. I have been reading some posts about using dedicated flash above 1/ 500 with sb 600/800 flash and you can do it by covering the two rear contacts.
With the non dedicated flash no tape is required, and you still get auto light control via the flash! not as good as ttl, but works fine 80-95% of the time!
This is big news! It should be old news, let me know what you know or can find out.
Mark.
Camera and flash set to iso 400 f4. flash, Sunpack 383 super.
EDIT;
Its a crapograph,I know, but the exposure is good. And the shutter speed, 1/8000!!!
Incredible!!! Something must be wrong.
Mark.