Drilling a metering block for PVRC jets

When I've done any of these restrictions (IFR, E-bleeds) that's what I try to do. When I think its close, test by running a set screw in and see how deep it is. I'm sure there are better ways. Mark W. has mentioned using a nut on the tap as a stop. I haven't tried that. That probably only works when going straight in, like when installing a lower IFR.