i started to do a bit of heel-toe when my mini kept dying at idle. whats double d clutching?
When you change down a gear, you do it in three stages instead of one move. So from fourth to third, you woul dip the clutch and into neutral. Off the clutch and bip the accelerator, different for every car. The idea is to put it at the right number of revs for that gear and speed. After blipping the accelerator, back on the clutch and into the new gear. If you get it right, it provides a really nice gear change. And it gives you slightly better acceleration than if the revs are off.
I tend to double blip the accelerator though whilst in neutral, just to keep the revs up.
As for heel toe, I have done it a couple of times but i havent been able to do itreguarly. Now I have got double d sorted though thats what Ill be practicing for a while. As for left foot braking, I dont think I have tried that. It just doesnt seem too natural. I drove my mates automatic Jag for a bit and even then I still used my right foot for braking.