Re constant steering correction:
Agree that it takes some getting used to handling a bus!
Had a serious steering problem caused by purchasing the WRONG tires for my '96 Beaver.
Was sold 16 ply RATED tires that were really 12 ply. Got a great price - saved $150+ per tire. Thought the installer was having a much too easy time mounting them but assumed truck tire dealer knew what he was doing. Actually traveled about 100 miles on them returning to my home with the rear end fish-tailing all over the road with constant steering correction. Scary!
Fish-tailed back to the tire dealer (should have gotten a police escort) and had them replaced with the same brand, TOYO, in full 16 ply. First tires flipped off the rims like silly putty - Ah, ha! Took two husky men to nudge each of the stiff 16 ply back on - Ah, ha, ah, ha.
Traveled cross-country several times after that with sure footed tracking and steering.
Lesson: be sure all tires are full 16 ply - I know, heard this song before...