Sorry gentlemen cannot agree ,there is more evidence that suggests most if not all Das Reich Tigers would still be using the Feifel System in July 1943 than not.All 14 DR tigers entering the fray at Kursk would be Early versions all with Feifels,there was no other version available to any tiger unit of the German Panzerwaffe/ SS at that time.Replacement Tigers received by DR before Kursk may have had various alterations to the originals of February 1943,but they would still be early versions with Feifels.The Feifel system was discontinued in OCT 1943 ,months after the battle,until the order was given Feifel systems would have been repaired/installed as per the manual without exception,allowing for spares of course.Photos showing DR tigers without Feifels must be dated after Kursk,even if the system was somehow damaged during the battle,many of the components that make up the system would still be visible in photos of the battle,photos showing no components at all ,clearly indicate being taken after the summer of 1943.Therefore to place K&C Tiger S33 as modelled,at Kursk would be incorrect,after the battle would be more accurate .We should remember that the attrition rates of DR Tigers were miniscule to its Tiger compliment therefore there was not numerous replacements before Kursk ,DR combat tiger returns show that from Feb1943 to July 1943 only 3 tigers were lost,captured,caught fire and knocked out and since Kursk occured before the new July 1943 turret was in theatre all Tigers in the Kursk Theatre would be early versions with Feifel as per attached photos.