Increase Scroll Speed Kensington Trackball

I have a Kensington Expert Mouse Trackball I am using on Ubuntu. It was a 'plug-and-play' set up so everything is working as expected. Although, I did notice the scroll speed using the scroll ring is a little slow for my liking.

I looked into the xinput command and that looks simple enough, but my question is: Which one of these commands do I need to adjust to increase the speed of the scroll ring?

$ xinput list-props 10
Device 'Kensington Expert Wireless TB Mouse':
    Device Enabled (187):   1
    Coordinate Transformation Matrix (189): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
    libinput Natural Scrolling Enabled (322):   0
    libinput Natural Scrolling Enabled Default (323):   0
    libinput Scroll Methods Available (324):    0, 0, 1
    libinput Scroll Method Enabled (325):   0, 0, 0
    libinput Scroll Method Enabled Default (326):   0, 0, 0
    libinput Button Scrolling Button (327): 2
    libinput Button Scrolling Button Default (328): 2
    libinput Middle Emulation Enabled (329):    0
    libinput Middle Emulation Enabled Default (330):    0
    libinput Accel Speed (331): 1.000000
    libinput Accel Speed Default (332): 0.000000
    libinput Accel Profiles Available (333):    1, 1
    libinput Accel Profile Enabled (334):   1, 0
    libinput Accel Profile Enabled Default (335):   1, 0
    libinput Left Handed Enabled (336): 0
    libinput Left Handed Enabled Default (337): 0
    libinput Send Events Modes Available (307): 1, 0
    libinput Send Events Mode Enabled (308):    0, 0
    libinput Send Events Mode Enabled Default (309):    0, 0
    Device Node (310):  "/dev/input/event7"
    Device Product ID (311):    1149, 32792
    libinput Drag Lock Buttons (338):   <no items>
    libinput Horizontal Scroll Enabled (339):   1

I have an alternative slotion to increase the scroll speed.

Step 1. Install the package lm wheel using the command

sudo apt-get install imwheel

Step 2. Download a bash script from here. Save the script in your home folder. Make it executable. Execute the script to open a window that helps to change your scroll speed.