Ive done my fare share of DXM, it has just hit me pretty well. I have taken high ammounts such as that, but the day after i feel all slugish and it sucks, but we will see what happens.
Bud to my knowledge amplifies everything, and your senses. Not that it makes you psychic or something. and if it does, call me cause I wanna know what your smokin on But anyways, yea it does depend on your weight as well, but if you have gone this far into the trip already and you dont feel like you are climbing any longer, then thats probably how far up you are going to stay for the duration.