Hi Iceman,
Yes the HEMTT covered is now present and correct. As the issue appears to be due to corrupted files on my end this should be a non issue and this ticket can be closed. When I get a chance I will do a full redownload of arma (I have very slow internet), retest everything and will reopen if I find anything then.
The only thing I find worrying is that steam verify did not detect corrupted files at all. In fact it didnt even detect me deleting files until I had deleted around 10 (5+ pbos and 5+ bisign)