diff --git a/data/images/units/defaults/default_lam_mek.png b/data/images/units/defaults/default_lam.png
similarity index 100%
rename from data/images/units/defaults/default_lam_mek.png
rename to data/images/units/defaults/default_lam.png
diff --git a/data/images/units/defaults/default_quad_proto.png b/data/images/units/defaults/default_proto_quad.png
similarity index 100%
rename from data/images/units/defaults/default_quad_proto.png
rename to data/images/units/defaults/default_proto_quad.png
diff --git a/data/images/units/defaults/default_super_heavy_mek.png b/data/images/units/defaults/default_super_heavy.png
similarity index 100%
rename from data/images/units/defaults/default_super_heavy_mek.png
rename to data/images/units/defaults/default_super_heavy.png
diff --git a/data/images/units/defaults/default_large_trailer.png b/data/images/units/defaults/default_trailer_large.png
similarity index 100%
rename from data/images/units/defaults/default_large_trailer.png
rename to data/images/units/defaults/default_trailer_large.png
diff --git a/data/images/units/defaults/default_small_trailer.png b/data/images/units/defaults/default_trailer_small.png
similarity index 100%
rename from data/images/units/defaults/default_small_trailer.png
rename to data/images/units/defaults/default_trailer_small.png
diff --git a/data/images/units/mekset.txt b/data/images/units/mekset.txt
index 1f705f5c90..539a8f28ca 100644
--- a/data/images/units/mekset.txt
+++ b/data/images/units/mekset.txt
@@ -49,17 +49,17 @@
 
 # As of v0.29.61, mekset files can include other mekset files.
 
-# these 53 must be in here
+# defaults
 exact "default_ultra_light" "defaults/default_ultra_light.png"
 exact "default_light" "defaults/default_light.png"
 exact "default_medium" "defaults/default_medium.png"
 exact "default_heavy" "defaults/default_heavy.png"
 exact "default_assault" "defaults/default_assault.png"
-exact "default_super_heavy_mek" "defaults/default_super_heavy_mek.png"
+exact "default_super_heavy" "defaults/default_super_heavy.png"
 exact "default_quad" "defaults/default_quad.png"
 exact "default_quadvee" "defaults/default_quadvee.png"
 exact "default_quadvee_vehicle" "defaults/default_quadvee_vehicle.png"
-exact "default_lam_mek" "defaults/default_lam_mek.png"
+exact "default_lam" "defaults/default_lam.png"
 exact "default_lam_airmek" "defaults/default_lam_airmek.png"
 exact "default_lam_fighter" "defaults/default_lam_fighter.png"
 exact "default_tripod" "defaults/default_tripod.png"
@@ -76,14 +76,17 @@ exact "default_hydrofoil" "defaults/default_hydrofoil.png"
 exact "default_infantry" "defaults/default_infantry_platoon.png"
 exact "default_ba" "defaults/default_ba.png"
 exact "default_proto" "defaults/default_proto.png"
+exact "default_proto_quad" "defaults/default_proto_quad.png"
 exact "default_gun_emplacement" "defaults/default_gun_emplacement.png"
 exact "default_wige" "vehicles/Hiryo.png"
-exact "default_aero" "defaults/asf.png"
-exact "default_small_trailer" "defaults/default_small_trailer.png"
-exact "default_trailer" "defaults/default_trailer.png"
 exact "default_rail" "defaults/default_rail.png"
+exact "default_rail_tractor" "defaults/default_rail_tractor.png"
 exact "default_rail_car" "defaults/default_rail_car.png"
-exact "default_large_trailer" "defaults/default_large_trailer.png"
+exact "default_maglev_tractor" "defaults/default_maglev_tractor.png"
+exact "default_trailer_small" "defaults/default_trailer_small.png"
+exact "default_trailer" "defaults/default_trailer.png"
+exact "default_trailer_large" "defaults/default_trailer_large.png"
+exact "default_aero" "defaults/asf.png"
 exact "default_small_craft_aero" "dropships/Long-Range Shuttlecraft.png"
 exact "default_small_craft_sphere" "dropships/DropShuttle.png"
 exact "default_submarine" "defaults/default_submarine.png"