Probably not going to happen unless you are WAY off the mark or cause a deal. I'd say within altimeter tolerance is OK, so yeah 300 feet. Say if you are told to cross XYZ at change it up 7,000 might be because center wants you above some approache's airspace which might ruffle some feathers if you bust that. I'm just a CTI student and a very marginal IFR pilot. I'm sure 99% of these boards could give a better answer. Hey though, only way I learn is to chip in and get told I'm wrong. Rather have someone here tell me that than have a strip bay tossed at me by a professor
