I have officially found my favorite LED Light Strip modification for the RatRig V-Core 3. I used someone's files from Thingiverse for a "backing plate" and purchased the following 24v LEDs from Amazon: https://amzn.to/3Oj6aZl

Backing Plate: https://www.thingiverse.com/thing:5212061

Simply print out the backing plate x2 for the 300mm, and install it into the rear of the front extrusion. Run your wires from a Spare Hot-End connection on your board, or other dedicated 24v port. Cut the LED strip to size at the proper point, and attach it to the backing plate. PROFIT! Oh, and we share some Macros we found online below for your config. One you add these macros, add the LED_PCT_PRINT to your START_PRINT macro, and LED_OFF to your END_PRINT macro and you are good to go.

NOTE: CHANGE THE PIN TO THE PIN YOU ARE USING! WE ARE USING HE1 ON OCTOPUS 1.1 (HOT-END #2)

[output_pin caselight]
pin: PA3
pwm: true
shutdown_value: 0
cycle_time: 0.0002

[gcode_macro LED_ON]
gcode:
  SET_PIN PIN=caselight VALUE=1
[gcode_macro LED_PCT_IDLE]
gcode:
  SET_PIN PIN=caselight VALUE=0.06
[gcode_macro LED_PCT_PRINT]
gcode:
  SET_PIN PIN=caselight VALUE=0.4
[gcode_macro LED_OFF]
gcode:
  SET_PIN PIN=caselight VALUE=0