Builder legal history matters more than project brochures

Builder legal history matters more than project brochures. I'm eyeing a 2BHK in Noida, near Yamuna Expressway, purely for investment. Prices have shot up post-Jewar news, so I'm pushing my budget to around ₹75L. I'm looking at projects like Eldeco Green Meadows by Cosy Reality. But honestly, I'm super nervous about the legal side. Is just RERA registration enough to trust a builder? Ya fir aur bhi kuch dekhna padega? I've heard horror stories about title verification issues. What are the absolute must-do steps to verify a builder's legal track record before paying anything? And for an investor, what about encumbrance certificates? Not sure if that's something buyers usually check. Any real red flags I should look for?