Just found
something interesting. Hotz, Horag, Lista and Leinhard are all closely linked. Hotz and Leinhard formed the Horag-Lista team in the early 1970s so 802-8, 802-11, 802-12, 802-14, 802-15 and 802-19 are more closely connected than I realised. Two of these seem to split off into the Konrad team and another one or two vanish early (crashes?) but the Horag-March that ran in Interserie was all part of the same effort. "Horag" is simply Hotz Racing AG.
Allen