Everyone who commented on the Hackaday article is saying I should stick with my 1KW motors. So I went back to the drawing board amd redid a few things. I think I can, I think I can. Meanwhile, as I wait for the tank to return from April's STEM Faire, I started mocking up an idea for eliminating the need to tension the tracks beyond a certain point. That does involve letting the track 'sit' on the road wheels. I will be testing this idea in miniature....here's a picture: