I have Dawson’s on my PPS and PPQ - black rear and FO front. Here’s how I did it. First, I bought new rear sights and put them on my gun. Shot it at 21 feet with my preferred carry ammo (HST 124 gr) and with my preferred sight picture. This then allowed me to buy the perfect height front sight for me. My PPS took the recommended sight set to replicate the factory sights. My PPQ did not. They shoot to exactly the same POI for me and that’s all that counts.