Wheelchockholder for trailer

I remixed the wheel chocks RC Bf 109 from Pilot1515 a little bit (I only removed the BF 109 text) https://www.thingiverse.com/thing:2611902
So I designed a wheel chock holder for my Team Raffee Co. dual axle 1/10 scale trailer,
the holder hangs over the top rail and clicks to a vertical post, it can hold 4 chocks.

As usual I included the skp files just in case you want to change anything.
Please let me know if you do.