well being i havnt really played awhole lot my ability is lacking maybe alot. any way i have some questions. one i have a hard time sitting in one place. i think hesitation is one problem. my controller set up i think is another.. i was playing tactical but changed i found my self going down really fast when i see some one so i changed that. however the sensitivity i have set at 7 now if i change that and go lower does that mean i will be moving slower. i think i have tunnel vision when it comes to playing. so where do you think i should make my changes. other question is from what i read you have to do your marksmanship in core, why cant you do it in hc. i rarely play core so that will be an adjustment.