I want to delete all artillery units. I tried following sebidee's "How to delete units from a unit pack" tutorial, but didnt find the custom_battles permissions. So what I did instead was delete every unit labelled "stealth and artillery" not from the boshin campaign within Units_to_groupings_military_permissions, Units and unit_stats_land. But after using pfm to optimize the pack and loading a custom battle with it active I found that mongonels and fire rockets were still around. Whats the proper procedure hombres?