Double bridle recommendations

Is he leaning because he's unbalanced, or taking hold and tanking off when excited/spooked?
If he's unbalanced and you're wanting the double for dressage/showing, you'd be better placed doing a bit of schooling first to get him carrying himself properly before bringing in the double bridle.
If he's tanking off and you want the curb to slow him up, for a horse that leans and/or puts his head down it would be worth looking at other bits to try and correct this, as the action of a curb bit tends to lower the head.
 
Is he leaning because he's unbalanced, or taking hold and tanking off when excited/spooked?
If he's unbalanced and you're wanting the double for dressage/showing, you'd be better placed doing a bit of schooling first to get him carrying himself properly before bringing in the double bridle.
If he's tanking off and you want the curb to slow him up, for a horse that leans and/or puts his head down it would be worth looking at other bits to try and correct this, as the action of a curb bit tends to lower the head.
He does not take off. and does not respect the snaffle at all would stick his head up and holds it and doesn’t get soft. He got cleared by the vet that nothing is wrong with him and is on physio two times a week. He is a very kind horse but he just puts all of his weight on the left rein
 
He does not take off. and does not respect the snaffle at all would stick his head up and holds it and doesn’t get soft. He got cleared by the vet that nothing is wrong with him and is on physio two times a week. He is a very kind horse but he just puts all of his weight on the left rein
It is a schooling issue if he is on one rein. I've a huge heavyweight horse that does the same and it is so easy to find yourself locking the left rein buried into the neck and have little to no contact on the right. Effectively you are riding a rude banana.

Back to basics with concentration in slow paces on suppleness. Leg yield, shoulder fore, renver, endless transitions both within pace and in and out of paces etc, to continually ask the release of the stiff side and always reward self carriage, which will only be fleeting at the beginning. A bit will not fix your problem and certainly not a double bridle. I have a horse with exactly the same evasion, which although not a particularly tall horse at only 16h she is a hefty weight at 750kg with a front and arse like a bull. I use this for schooling and hacking https://nsbits.com/products/mouthpiece/starter/starter If the horse does something more exciting I use a Waterford, which she can't grab hold of if I don't grab her. The grabbing is the problem, it takes two to pull.

Your physio should have given you exercises to help lift the thoracic sling which in turn will help with suppleness and if you have access to a good instructor who will take you through all the slow work until self carriage comes that would really help you.
 
I cannot use a waterford I am doing dressage. But thanks for your recommendation ! appreciate it
You can’t do dressage in a double bridle until you have reached elementary and if your horse is not going correctly in a snaffle through prelim and novice tests you are way off capable of using a double. A good trainer is needed and commencing the incremental stages of training.
 
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