I have a mountain bike I use for light touring that has a cheap SunTour crankset with riveted on chainrings. I wanted to be able to take my chainrings off so I went and bought a FSA AlphaDrive crankset, mostly becasue it was only $70 Can and it fit my square tapered bottom bracket. But the FSA cranks don't tighten down as much as the SunTour ones did, so my fr. derailer is all out of wack due to the chainrings being father from the bottom bracket then they are supposed to be, also my chainline is off a little, not that it was perfect before, but it's worse now. I really like the cranks but I don't know if all this will cause problems, will the cranks loosen up after riding and seat better? I cranked on them for all I was worth with a 8" hex wrench and got them as tight as I could, yet they are still about 1/4" out farther on either side of the bottom bracket then the old ones where. I don't want to go back to the SunTour cranks, these ones are way lighter and nicer looking, plus they have removable chainrings. What should I do?