i had a few problems with mine same as u sard 800's on gready copy... where are they leaking...
Mine first leaked out of the O' ring at the top of the injectors, replaced O' rings
Second i blew them out from the plenum (High boost on the dyno) shortened the fuel fail spacers...
third time it was the O' rings again... they were sitting to high in the fuel rail and getting washed out, made up some spacers for the top of the injectors at work.
I haven't go to test the last mod yet as i wrecked my plenum....
Hope it helps...