I have nothing backwards. Heinz Gurderian was instrumental in developing the Panzer arm but it was Erich von Manstein who developed the risky and very successful plan for a drive through the Ardennes.
Look up the Manstein plan and see how it is very different from the Schlieffen plan. Gurderian was not shy about giving Manstein credit in 1940 and for all of Manstein’s contributions to German arms thereafter.
I have. And it all points to Gurderian. And Rommel.