Originally Posted by TaralovesBenni
Yes I have realised that, he is a lot more calmer and less forward going without a saddle
This should be a flashing red light regarding saddle fit. Horses naturally run away from pain or danger.
I'm glad to see that you are having a saddler look at him. I have a suspicion that a reflock of your current saddle or a new, differently shaped saddle will improve things quite a bit.
If he still leans on the bit, then maybe a trainer is in order. I would not add a harsher bit to a horse like that unless I knew exactly what I was doing based on a lot of previous experience.