I think the Proline hubs use trailing axles very much like the new AE SC10 front end setup that uses a hex .....
Save your money and look for a In-line setup .... you can't believe how different and how badly the car drives with trailing axles. I spent 2-3 months trying to make these work, and failed !!
Do you have the short pin in the bottom and a a screw with a shoulder in the top as in the build thread ?
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