rear brake cable adjustment adaptions?

[Reckless Rat]

Interesting thread, although on my car I can't see a huge advantage. With a Girling front axle and an Austin rear, even with fitting shorter brake levers on the front I have to leave quite a lot of slack in the rear cables to prevent rear wheel lock up under heavy braking. The weight of a long turnbuckle like those in the last photo might cause the brakes to drag, which will then require extra springing on the cams to prevent it. A sort of solve one problem and create another scenario?

Just my two penn'orth.