Here is a Saveset i made. I'm not sure if it will even work but i figured if anyone wants to give it a shot why not. This is on legendary at the beginning of every checkpoint that would remove the mods. If there is one save in the folder it is because the mods never come off during those levels. Each save has unlimited ammo, 127 of each grenade type, and god mode. If this works for anyone can you let me know. make sure to rehash/resign with modio.

Halo Reach Legendary Saveset 04/06/2016
Halo Reach Legendary Saveset