Before revision:  Afterwards, we demonstrate how the method of Sch\"uz and Seal 2020 generalises in a straightforward manner to any of these schemes, and prove convergence properties of the resulting IMEX schemes.
After revision:  Afterwards, we demonstrate how the method of Sch\"utz and Seal 2020 generalises in a straightforward manner to any of these schemes, and prove convergence properties of the resulting IMEX schemes.