Ayewhat have you concreted in that is not lasting? driving in an rsj ? all sounds like bs to me..
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can't remember when that was put in.
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theres yer railway line ... cut with a nine inch angle grinder and hangings welded on with a an 180 amp oil cooled welder
...put in ,must be about 40 yr ago ,i bet it will be there long after im dead and gone...
been doing several recently .lot dearer doing them atm though all replacing wood of various types.
A good made post like that will save a lot of time by no having to be replacing it
Will look good when you've installed a few more and made enough time to trim the hedge