If I may:
- replace the metal hooks on the harness with paracord through the belt grommets.
- replace the metal ALICE clips with either MALICE clips or cheaper, single use black wire ties.
- balance your load left to right and front to back.
- place larger pouches over to side (like ammo pouches) instead of front. This will also enable you to get to your mag pouches in the prone.
- keep the back clear of crap. When you wear a pack, don't put pouches/canteens etc. on the back, unless you wear the belt low, so that the pack rides on your back, not on your pouches. This will also allow you to wear a pack waistbelt for heavier loads.
- keep the shoulders clear of stuff. No knives, flashlights, pouches, etc. Unless your unit's SOP requires you to wear your first aid case on the left shoulder, keep it slick. Keeping the harness straps slick means the pack straps will ride better, and if you have to go to weakside shooting, nothing equipment related with prevent you from getting a good cheek weld.
Your LBE should have, at the minimum:
ammo (for your primary and secondary weapons)
first aid kit (for you, not for someone else)
secondary weapon (if you have one)
water (either canteens or Camelbak, as long as neither affects your pack fit)
Good to have:
compass (if you aren't issued one, buy a Silva Ranger CL)
ditty pouch (a pouch other than your magazine pouches to hold a flashlight, Gerber tool, pencil, paper, camo stick, pogey bait)
Knife (either bayonet for your rifle or a practical field knife)
Raingear can go in the pack unless you ground it and it's raining, and then it's worn or attached to the back of your harness.
I used to set up my LBE to live off of it in case I couldn't get back to my pack. I would have (all on belt):
4 ammo pouches (I never had grenades, since I was in the peacetime army, so I could put them close together)
1 field knife (when I could get away with it)
1 compass and pouch
1 battle dressing pouch with two dressings (remember, entry AND exit wounds)
4 canteens
1 buttpack with raingear, 2 or 3 MREs broken down to entrees, crackers and cheese spread, camo stick and poncho liner (I wore my LBE low so it would clear the ruck) and two pair of socks, all in a water resistant bag
It makes for a full belt, but I never went wanting.