On several of the ILS and RNAV LPV approaches in my area (and notably the ones I expect for my checkride), I consistently intercept the GS at 0.1-0.2nm before the FAF.
An example: I am flying at exactly 2000 (with correct local altimeter setting) from BONOO to JERIT, but I intercept the GS before reaching JERIT. There are no step-down fixes to worry about.
Should I follow the GS down at intercept, or wait until the FAF and then try to recapture the GS from above? Both seem unwise for different reasons.
I’m looking for a reference sufficient to defend my choice to a DPE.