【Outdated】 6.2 ⭐ with Low Research

6.2 can definitely be done with lower researches than what is shown in this video. Obviously, I would advise against using anything lower, as you still want to complete the level with more than 1 star at some point. If you're trying to speedrun to 6.3 or 6.4 for Crusher then this should hopefully help you get the 6.2 clear needed to reach that point.