Filaments Used:
PLA Black Transmission Distance: 0.5
PLA Gray Transmission Distance: 4.5
PLA Yellow Transmission Distance: 3
PLA White Transmission Distance: 3
This print uses 4 unique filaments

Swap Instructions:
Start with Black
At layer #10 (0.88mm) swap to Gray
At layer #15 (1.28mm) swap to Yellow
At layer #21 (1.76mm) swap to White for the rest.

For those who want to print smaller, please do not reduce the Z scale