I agree, this needs to be updated.
However, I think it would make more sense to add wrench upgrades as suggested previously in this thread. Making more expensive wrenches that will never break machines is much more sensible and user friendly than either the mode command on the electric wrench or this mod.
With this mod users do not have the option to break their machines, which some players may find useful.
I'm sure the electric wrench modes made sense in theory, but it practice I find it to be a poor implementation. I get no feedback when I press M so I have no idea what mode the wrench is in or if I have done anything at all. IC2 really ought to have a dedicated tool that guarantees 100% drop rate on machines.