Thanks guys,
Not too worried about my ability to get through the day humping the kit (I’ve done worse) more about the fact that it may slow me down from a run to a nice sniper friendly jog. Also the extra two mag pouches fitted to my plate are quite bulky in confined places.
Ill stick with 9 for now and see how it goes, easy enough to sling the extra mags and pouches in my bag and fit them to my plate during the day if I find I keep running out of ammo.