I’ve encountered base mouldins that captured the plaster wall above so removing the base was a no go. I also prefer not to have a shoe base. Perhaps a biscuit joiner could do the job. The Elu’s body was angled so that it could double as a slot cutter and would be the best at this. Conventional biscuit joiners are designed really for plunging but may do the job in a pinch. It will depend on how much you want to remove and how low you can go with the biscuit joiner.