Hinge pins for the Stampede?

[MTBikerTim]

I have bought a stampede from a mate for my step son. What I want do do though is make it as maintenance free and as robust as possible. He is too young for brushless so don't suggest it . Here are a couple of pics.

I have cleaned it up, it was filthy. Done some cable management and put some rpm hubs and bearings in it. There is an rpm bumper on the way too.

The only thing I now want to do is replace the screws/hinge pins with something that won't undo itself every battery pack. The screws I am talking about are the ones that can be seen in the second picture holding the A arms to the chassis. I know Lunsford have a hinge pin set for the stampede. Does this include those pins and are they the style with circlips that won't undo themselves? If not what other solutions are there?

Thanks guys.