So I secretly started this project, a long with many others, so NO ONE would leak it, but here is the final Concept, the tank to replace the Cruiser MK2 and MK3 (yes it is still a prototype).
The Anton Heavy Metal Works, Project "MUAAT" (Multiple Unit Amphibious Assault Tank)
Here it is so far:

(Project "MUAAT", speed tests)

(Project "MUAAT", engine life expectancy tests)

(Project "MUAAT", water testing)
There are many other tests I won't show you so you can't build a better MUAAT until everything is released.