[General] Copying unit properties in object editor and pasting them to another unit

Level 9
Mar 29, 2015
So, I'm trying to copy a unit in the object editor and paste it onto another unit. I've made Thrall into a melee hero, and edited alot of his data so that his attacks are melee, changed his stats, etc. but when I copy the unit, and post it into another campaign, it copy and pastes the whole unit. What I need is the copied Thrall to overwrite the vanilla Thrall, that way I won't have to change his properties every time. Is this possible?