[Shan]

I know what he wrote, and there must be the mistake, as in our private conversations he wrote HEAT. All I can tell you is that he must have mixed up Sabot and HEAT. I can't really imagine how a tandem-SABOT should work anyways. ---
See
http://www.doppeladler.com/oebh/kuerassier.htm or http://www.kotsch88.de/autolader.htm or http://www.waffenhq.de/panzer/kuerassier.html for reference.