Friend is asking. Wants to do some tuning to his etek4. It's been broken in. Would Lurker method of sweet spotting be applicable to a Etek4?
1: Back out both regs or Zero out both the LPR and HPR to 0psi
2: Raise HPR slightly only to set LPR for cycling
3: Raise LPR to fully cycling ~45psi or so
4: Raise HPR until velocity begins to stop rising as you increase pressure
5: Raise LPR to desired velocity
6: Lower HPR a bit, then raise if necessary... you're trying to find the best HPR setting at the LPR setting you have. This may put your velocity over 300/285
7: Lower LPR slightly to field velocity