Regarding Harvey size could in theory be a concern because he might be too small, or too weird with the crane to be able to fit in an eyemech.
However. We have a solution. Beau doesn't have an eyemech but is specifically billed as having operating lamp to get around not having that gimmick. So if moving eyes were too hard for Harvey. He could simply be "Harvey without moving eyes, with poseable crane arm." Thus he still has a gimmick but it's not the eyemech. Of course this might not even be necessary, he could work fine, but figured it was worth shouting out.
I don't think they'd make his hook moveable though just cause of the size. Might be too hard to make look good and not super breakable.
However. We have a solution. Beau doesn't have an eyemech but is specifically billed as having operating lamp to get around not having that gimmick. So if moving eyes were too hard for Harvey. He could simply be "Harvey without moving eyes, with poseable crane arm." Thus he still has a gimmick but it's not the eyemech. Of course this might not even be necessary, he could work fine, but figured it was worth shouting out.
I don't think they'd make his hook moveable though just cause of the size. Might be too hard to make look good and not super breakable.