Took the test again 3 days back and finally got 740 (48q, 44v). Happy the work paid off.
If I studied 2 more weeks full time I feel I could aim for a very realistic 750/760 and maybe even a 770/780 at my very very best (As I am confident I could reach the 50-51 on quant if I put enough time and the 45 in verbal), but it is not worth the time investment. If I were to do it, what I would do is mainly work on harder Quant problems and strengthen my sentence correction even more.
For Quant hard questions I found a great set of questions split by topic put together by some guy called Sandeep Gupta from Ivy GMAT. If you search well enough you should be able to find it online. Unfortunately I didn’t have time to solve any or work on any large enough set of hard quant questions generally. This I feel definitely hurt my quant score.
All in all I am very happy with the time investent/reward achieved. Will soon post a review of the whole process so that others can benefit from the work of these past weeks.
All the best!