Hi Dunkan,
I believe the PM was for me as I received one from Rick...!
I agree with you on the headache it would have been for me but is unfortunate that it had to be that way, the installation of the whole VFD and motor upgrade seems to be a simple and quick job and that is tempting but the costs are not.
I don't know what the answer is in relation to the faulty units out there, some people may have ignored the problems or think that is was "normal" either way, I doubt Tecknatool will make a recall of the VFD's, they may assist those that complain until all the old units are gone and the ones start to circulate, I don't really know...!
Cheers
George