New P-07 in, plan to Cajunize (looks like hammers are out of stock so on hold for now), had same issue, decocker was really stuck. Screwdriver trick in video didn't work. Brass punch and hammer on one of the internal shoulders on the bar didn't help. Finally got it by some magic combination of pressing in with same punch on shoulder next to the decocker spring, while pressing down with variable pressures on both the sear and the ejector. Suppose it's a tolerance problem, had no trouble on the 3 other polymer omegas I've worked on.