Hallo Arnie, What a nice job you are doing with the Panzer 4,
I have never had a metal hull so I do not know whether it came with track adjusters or not, usually with the HENG LONG Panzer 4 you end up buying a pair of after market adjusters and fitting them yourself,
I do not think I have ever seen or used a good pair of track adjusters on a Panzer 4,
I do know that the after market ones have to be used with great care or you will break them,
Your tracks as you have already noted are too slack and I would give serious thought to removing at least one link from each side and see whether that helps to keep them in place on the wheels and sprockets,
There is one thing you must do if you have not already done it, you must make sure the tracks are properly in line with the wheels, rollers and sprockets because if they are not you will never keep the tracks on.
Have you given any thought to what Abteilung it will represent?
Peddinghaus, Archer and Elite will all do one off decals for a price so it is possible to have your own individual Panzer 4, if you decide to go with a unit serving with the Afrika Korp do remember that Peddinghaus will not be able to make or sell you an Afrika Korp Palm as it contains the Swastic

shaun