lcoverton

I am upgrading my pede w/ the ST Racing front knuckles and rear knuckles
including the bearings. I'm still using the stock plastic front arms and what I think are called turnbuckles?
They link to the front servo, and then to the the knuckle with a pivot joint.
I got the new knuckles and bearings on the front on the left side, but the nut that goes back on the knuckle
can't be tightened. I can see now that the new piece is thicker than the old which is why. (correct me if I'm wrong so far, please)

The question or questions is what kind of turnbuckle do I want for an electric pede, I saw on amain that they come in different thickness?
I just want one to fit what I've got, and don't care if it's red, silver or blue. I see 39mm, 49mm, 59mm and other terms.

Any suggestions will be appreciated. I am new at this and never built one before.

Thanks,