i disagree completely here. ephedrine is worthless without the caffeine(except for decongestant/BD).
you can use a thermo instead of just plain C, but make sure it has about 200mg of caffeine in each dose. also, it is fine for some to stack stims, but far to much stimulation for others . i like amp+E but only tried it once or twice. watch out for stacking E with things that have yohimbine in them or other strong stims, or at least start doses low. i would start with just the EC if it is your first time doing though.