I would think so - but you'd be on your own, there is no guide (you could make one as you go along)

Original Cube Dimensions: 9.8 x 7.7 x 7.7

Original G4 mini Dimensions: 2.0 x 6.5 x 6.5 ( so it should slip right over the logic board - getting the optical drive to line up could be a challenge).

Newest mini Dimensions: 1.4 x 7.7 x 7.7 (NO optical drive)

Good luck,

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