Base game insert went straight to recycling so it could hold all the map boards.
Yes, I'm using the army box inserts to hold all the unit counters from the Base game, stretch goals, army boxes, D-Day expansion and separate expansion boards. Also the abilities and upgrade tokens and dice. And the force templates.
The terrain overlays, fire overlays and some of the misc tokens are in a tupperware box.
I like the army box inserts for keeping squad tokens together. It could have been better but it is certainly usable.
Could you post a pic of how you used the army box inserts? I thought they were useless!