Let's be honest, there's nothing worse than a nick in the sack while trimming, Philips' OneBlade skin guard stops that from happening. Currently, you cannot buy just the skin guard itself, so i made a 3d printed version.
Remember, trim the bush to make the tree look bigger
The logical way to print this is blade side up with some support. If the strength of the comb is a concern for you, you can try printing it sideways with soluble support, this will eliminate laminate weakness in the z direction.