This is my 2nd pershing but i still have not done as mutch reserch as the german armor there doesent seem to be as mutch on the net. Maby it will be one of the first 500 just so i dont have to get rid of the periscopes building the guards is to mutch of a pain to throw away. The track blocks are all that came with it as extras and using the spare tracks that come on the turet just doesent match up with the rest of them.