Brimstone and Digit also underwent a second redesign for their final series by second new animators Blue Sunflower Animation .
Digit 's appearance was only slightly different to Digit they had appeared for the second and third series .
Brimstone and Digit also underwent a second redesign for their final series by second new animators Blue Sunflower Animation , but their appearance was only slightly different to how they had appeared for the second and third series .