desdichato

I am currently in the process of building a Firefly and thought I would add a bit realism to it by getting metal track, I have got the T-47 track with the extended ends through the mail recently and I am about to mount on the tanks wheels and chassis however, I find that when I install the track pin it is very loose and comes apart quite easily, yet the rest of the track is ok so I'm wondering what on earth have I forgotten.

Any thoughs

TIA