[GeorgeM]

I'm no pro, but in my 3 years of DE, I've tried "heel and toeing" and it's many variations to see what worked best for me.

Yes, there is a method where you use your heel (on the gas) and toe (on the brake). It is well described in Bob Bondurant's High Perf. Driving book. Most folks seem to do the roll your foot to the gas method that Stephan described to blip the throttle on the downshift.

The gas pedals with the under the brake extension actually work quite well. While your foot is on the brake, you push the extension with your heel to blip the throttle. It may depend on how big your foot is as to how well this works.

The best gas pedal extension/add-on I've used is the "Third Foot" by Wings Engineering. Besides the under the brake extension (which I don't use), it raises the gas pedal surface higher to make it easier to roll your foot over to blip the gas, as you described.

The "Third Foot" is very well constructed and it looks great. It also has adjustment for height and tilt. It ain't cheap, but well worth it to me (I found mine on Ebay at about half price-keep your eye's out, they'll come and go quickly).

However you decide to do it, I don't think it matters much how, as long as your method works and you accomplish the proper matching of revs for the downshift.

Good Luck