Yeah, the engine upgrade is what'll really make it go. Go at 30 KPH, but the engine is strong enough that it can get that 30 KPH reasonably quickly and have it climb things without unreasonably slowing down.
In other news, I never noticed this crewman's first name before. Now I can't
unsee it.
And... I'm not planning on keeping the KV-1S after I unlock the IS, but should I stick with the short derp the whole way through, or equip the 85mm? I am going to try to get the long 122 while I'm at the KV-1S also, but... so much more grinding.