RERA check: sirf registration number enough hai?

My latest investment plan for Noida Extension is almost final, but I'm stuck on due diligence for a few projects. I'm looking at Satya Villas Extension; heard good things, but also whispers about Bhavanam Krishna Kumari's track record. From my experience, RERA registration ek basic check hai, but what about the deep dive? Does anyone actually cross-check the land title documents and all project approvals listed on the RERA portal? Builders sometimes play games with timelines ya permissions. What's the best way to verify a builder's *actual* legal history, not just current RERA status? Title verification ke liye kaun se steps hain jo log aksar miss karte hain? Has anyone invested with Bhavanam Krishna Kumari? Any red flags you found on their past projects' RERA filings or title issues?