Behold, the original Stalin's comically long tank.
Also, a project of even longer one.
You forgot the third comically long tank Edit: maybe not comically long, but still... long enough.
There's always the Maus and Ratte project to top all anyways. Smh you can always count on german megalomania when needing some examples ridiculous feats of overengineering to the absurd.
Also, i just found the favourite company of all wehraboos, Wargaming (World of... series) just sacked their own head developer and the man who made their success, Sergei Burkatovsky, because he supported Russia in war in Ukraine. Then they liquidated their officess in Belarus and moved entirely to their ridiculously expensive building in Cyprus (which almost bankrupted them few years ago), absolutely not for tax heaven reasons.