just seen this, sorry for the late reply mate, hope you a feeling ok.
it is a terrible feeling when they tell you that there is no more they can do to help you……..but sometimes, there is more.
i was told that was it at LGI. i did a bit of reading on a AF forum from the states, there was more that could be done. and it proved good in the end.
have a proper good trawl on the internet, some stuff done in the states is not used here yet, too pricy. but if you find something there could be a specialist in the uk.
so keep on keeping on mate. hope you have a good outcome.