Advice/Help About Kimblewick Bits ?

[FourBurrowHunt]

Hello everyone,
I have a Cob x Gypsy Vanner that is realy strong and i have had snaffle's pelhams gag's in him but they're either to weak or to strong and i need somthing inbertween , I have been told on several accounts that a Kimblewick with a low port is good ( Metal ), But i am curious about the happy mouth / rubber ones he is going on 6yrs young and obviously i dont want to ruin him by putting on to severe in him. So any advice would be appriciated xxx

 

[xxMozlarxx]

I like Kimblewicks for strong horses, much better than hauling around with a milder bit, however it's the hands on the end of it which are important.