IMO better video will help a lot here..

My question is what are you trying to accomplish? Best footbrake launch or planning on using the transbrake? IMO if you plan to run the car on the brake all this stuff footbraking is kinda useless IMO. If the goal is to make it the best it can be while on the brake then why even bother with how it works footbraking, or are you looking to run a class where you have to footbrake it? Even if you do find a way to make it work decent footbraking all that may be totally useless using the brake.

Generally speaking on the brake it should take little front end movement to get the car to hook, on a footbrake IMO it will end up taking a great deal more travel up front to work..But that is just a guess. IMO from what I saw in the video was a decent working footbrake car. But that means little if you are not looking to footbrake it..Just seems counter productive to worry about how the car leaves footbraking if that is not the intention.