Oil relief port and pressure

[cjridert1]

Which hole the the oil relief?? I couldnt make out which one. I attached an image with my best guess, let me know if I am right.

Also, how are most people measuring the oil pressure @ the feedline? I have dsmlink, but Im sure this ECU value is only @ the filter housing, rather than center housing (or do you guys treat them as the same?)

Thanks

 

[turboglenn]

That is the correct hole. AS for how far to grind it, i don't know, but from what i've read you don't want to get too close to the piston sealing surface.