Alhamdulillah, weights tu actually okay for twins at 35 weeks! Most twin babies gain around 150-200g per week towards the end, so by delivery time they could be around 2.8-3kg each, which is still within normal range for vaginal delivery. A few of my mum friends gave birth to twins vaginally with similar weights, so it's definitely doable lah, the fact that both heads are engaged is a good sign your body is ready. Tapi of course, kena monitor closely with your doctor sampai delivery day, sebab things can change, and they'll know best based on your full scan pictures and condition. All the best, mama!