Was planning on taking the 2ci when I arrive at the rave and having the changa at my friends house. Definitely agree with "should not" and "is advisable" being very different things, not only not worth the risk, but knowing there is potential risk would definitely make me feel uneasy and ruin the experience. Thanks for the replies, good to know it shouldn't tire me out much. thought I should check since a breakthrough salvia trip left me absolutely knackered afterwards, definitely would not expect subbreakthrough changa trips to be anywhere near as tiring, but thought I would ask since raving whilst tired is nowhere near as fun imo.