Hi Jamjar,
Yep you were lucky & I hope all is ok now.
I personally don't like the standard ball coupling, preferring TREG/Trigg hitches - but all can give trouble if an error is made in coupling up.
I had an incident on the Hume Highway at Tarcutta a few years ago (we still see the place where we managed to pull off the road) & the NRMA via our RACQ took our Eagle camper back to Gundagai without any issues.
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Warren
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If you don't get it done today, there's always tomorrow!