I'm looking for a harness to teach my boy to drive. I have had a couple of goes pulling a tyre from the surcingle. Obviously totally in appropriate but I wanted to see if he would be calm with something trailing behind. Indications see very positive. After 5 minutes leading him I was then able to pull with long reins. So I need to find a harness, but there are so many to choose from. So what would you recommend. I will eventually hope to drive in cart, but initially I want to pull tyres and chain harrows. So what do you recommend. I want a harness that wont pull apart. So not cheapy cheap, but something that I can uses for harrowing/pulling tyres and small logs. Should add hes 14hh.