diff --git a/README.md b/README.md
index d19ce1e..a05c89b 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Most features are usable by all classes, but a few are class-specific. If you wo
 - **Spy-Checking Lines:** sends a team message notifying players about an exposed spy (e.g. "Pyro is Spy.") by pressing `Shift` + the class' number (1-9).
 - **Suicide Explosion:** makes you explode at the touch of a button.
 - **Viewmodel Toggling:** toggles display of the active weapon at the press of the `Delete` key.
-- **Engineer: Building Bindings:** binds keys 6 through 9 to the Engineer's buildings, automatically destroying any existing buildings when pressed. You can also disable the PDA numeric keys; doing so will shift the building bindings from 6-9 to 4-7.
+- **Engineer: Building Bindings:** binds keys 6 through 9 to the Engineer's buildings, automatically destroying any existing buildings when pressed. You can also disable the PDAs; doing so will shift the building bindings from 6-9 to 4-7.
 - **Soldier: Rocket Jump:** a simple rocket jump script bound to `MOUSE2` when toggled on (use `R` to toggle). Does not provide optimal jump, but is a reliable way to rocket jump. Aim the rocket launcher at the ground before clicking.
 - **Spy: Taunt:** automatically un-disguises the Spy before performing a taunt. If pressing `G` once doesn't work for you, always quickly press `G` twice.
 - **Spy: Disguise Bindings:** binds key 5 through 9 to some of the Spy's disguises.
diff --git a/cfg/_settings.cfg b/cfg/_settings.cfg
index c84e37e..ecdb627 100644
--- a/cfg/_settings.cfg
+++ b/cfg/_settings.cfg
@@ -31,7 +31,6 @@ alias DEBUG_OUTPUT_ON_START "show_output"
 // Enables or disables the Engineer's construction and destruction PDA (not
 // essential with the additional key bindings). When disabled, the building
 // keys are each shifted two keys to the left.
-// You can still bring the PDAs up with mouse scroll.
 alias ENGINEER_PDA "pda_off"
 
 // LOADOUT_SWITCH
diff --git a/cfg/engineer.cfg b/cfg/engineer.cfg
index 28e57c4..0d71226 100644
--- a/cfg/engineer.cfg
+++ b/cfg/engineer.cfg
@@ -20,6 +20,16 @@ alias buildings_6 "alias key6 sentry; alias key7 dispenser; alias key8 t_entranc
 
 // PDA
 // Enables or disables the Engineer's PDA.
-alias pda_on "alias key4 slot4; alias key5 slot5; buildings_6"
-alias pda_off "buildings_4; alias key8 slot8; alias key9 slot9"
+alias scroll_1 "slot1; alias scroll_up scroll_3; alias scroll_down scroll_2"
+alias scroll_2 "slot2; alias scroll_up scroll_1; alias scroll_down scroll_3"
+alias scroll_3 "slot3; alias scroll_up scroll_2; alias scroll_down scroll_1"
+alias scroll_on "alias scroll_up invprev; alias scroll_down invnext"
+alias scroll_off "scroll_1"
+alias key1_off "slot1; scroll_1"
+alias key2_off "slot2; scroll_2"
+alias key3_off "slot3; scroll_3"
+alias pda_on "alias key1 slot1; alias key2 slot2; alias key3 slot3; alias key4 slot4; alias key5 slot5; buildings_6; scroll_on"
+alias pda_off "alias key1 key1_off; alias key2 key2_off; alias key3 key3_off; buildings_4; alias key8 slot8; alias key9 slot9; scroll_off"
+bind MWHEELUP scroll_up
+bind MWHEELDOWN scroll_down
 ENGINEER_PDA
\ No newline at end of file