Need help to make custom falling spike work - SMW Hacking Help

Custom sprite I'm trying to use is the falling spike by dtothefourth which can go in all directions but I can't get it to work at all.

Here's the part to customize;

Code

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; 
; Custom Falling Spike - by dtothefourth
;
; Falling spike that can go in all 4 directions and interact
; with objects
;
; Uses 4 Extra Bytes, set in Extension Box in LM as follows
;
;   SD SH TT SP
;       SD
;           S = Size - 1 (1-8 tiles)
;           D = Direction - 0 Down, 1 Right, 2 Up, 3 Left
;       SH = Shake Time (Vanilla 40)
;       TT = Trigger Distance (Vanilla 40)
;       SP = Max Speed (Vanilla 40)
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

!ShakeTime   = !extra_byte_2,x ; How long to shake before falling 
!TriggerDist = !extra_byte_3,x ; How close Mario has to be to trigger (0-7F)
!MaxSpeed    = !extra_byte_4,x ; Maximum speed spike can fall (0-7F)
!Accel       = $03 ; How quickly spike accelerates while falling

!Collide     = 0 ; If 1, will hit objects instead of falling through them
!Activate    = 1 ; If 1 and collide is set will activate blocks like hitting them with a shell

!FarDespawn  = 1 ; If 1 don't despawn unless far off screen, mostly if you want to use really wide spikes
!WideTrigger = 1 ; If 1 for multi tile spikes check both ends for trigger distance

What I tried;

- Deleted x value after the extra_byte_2/3/4 to insert my value ($40)
- Tried the same as above but starting the line with ! (!$40)
- Deleted the !extra_byte_2/3/4 and wrote my value ($40)
- Wrote my value after x
- Left it as it is and tried inserting with extension