Greater Noida property: Legal due diligence maze

Budget's set, but the legal checks are giving me major headaches. I work in real estate, but buying for myself in Greater Noida feels totally different. I'm looking at properties near Yamuna Expressway, maybe even Bulland Group Suryodaya Towers. Builders like Skytech Group have projects, but unka legal track record kaise verify karein? RERA registration toh dekhte hain, but kya hidden red flags hote hain jo common buyer miss kar jaata hai? Especially with title verification, what are those critical steps log skip karte hain? I know builders won't tell you everything. Is RERA complaint history publically accessible, ya koi aur way hai to check builder ka past? Don't want any future legal issues or possession delays, you know?