SimHub Display with Gear Indicator

My first attempt on making a simhub dash.

More details in the video: https://youtu.be/Q2DdccKuso0

Parts list:
For display:

• Arduino Nano V3 (https://www.banggood.com/Geekcreit-ATmega328P-Nano-V3-Controller-Board-Improved-Version-Module-Development-Board-p-940937.html?rmmds=myorder&cur_warehouse=UK)
• 2004 lcd with I2C controller (https://www.banggood.com/IIC-I2C-2004-204-20-x-4-Character-LCD-Display-Module-Blue-p-908616.html?rmmds=search&cur_warehouse=CN)
• 1.8" 7 segment LED display (Common Cathode version!) (https://www.ebay.co.uk/itm/1pcs-1-8-inch-1-digit-Red-Led-display-7-segment-Common-cathode-NUV/303351737834?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649)
• 8 Bit WS2812 5050 LED board (https://www.banggood.com/10Pcs-CJMCU-8-Bit-WS2812-5050-p-983035.html?rmmds=myorder&cur_warehouse=UK)
• 4 12x12mm tactile switches (https://www.ebay.co.uk/itm/20pcs-12-x-12mm-x-12mm-Momentary-Tactile-Push-Button-Switch-w-Black-Square-Cap/382852457465?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649)
• 74HC595 chip or breakout board
• 7 resistors 220 Ohm
• 4 M3 nuts
• 4 M3 20mm screws
• 4 M3 7-8mm screws
• 4 M4 nuts
• 2 M4 20/30mm screws
• 3 M2 6-7mm screws
  For monitor mount:
• M4 60mm screw
• M4 45mm countersunk screw
• 2 M4 nuts
  For wheel base mount:
• 2 M3 30mm screws
• 2 M3 nuts
• M4 45mm countersunk screw
• M4 nut