You can not use the breaking power you do not have, but you can modulate the extra breaking power you do have.
That's sure the Truth! I love the G103 hydraulic disc brake! Unfortunately, I fly a Speed Astir most of the time, which uses the same miserable Tost Kobold Wheel the LS3 and 4 use. Stretchy cables aside, I have never seen a Tost Kobold wheel that DIDN'T have cracks in the steel (iron?) brake drum portion of the wheel. The Tost BIMBO wheel is nothing more than a scaled up Kobold. Of course, I have one of those in the Janus.
Vintage Brake can make the drum brakes work well (a fiend's libelle brake is very powerful (after Vintage Brake treatment), even though it's the tiny Lilliput wheel.
The downside is the wait. He runs a 4 month backlog most of the time. I don't know what he can do if the drum has the cracks that are so common.