Oh that makes sense. I guess I assumed most people did that even for 35's as I did and have seen people tear stuff up on 35's just as much as 37's. I only gained 2 lbs per corner going from 35-37's so yeah they're heavier than stock and require precautionary changes, but IMO no more than my 35's didI think he meant improve instead of correct. For example, regearing, sleeving, C-gusseting are all somewhat essential to running 37s safely. Yes there is an exception to every rule but what I mentioned is pretty standard.
Also just to add to this conversation, I wheeled Prichett in Moab twice. Once with no spare or rear bumper and the second time with a rear bumper, spare and some additional weight in the back. I could really feel that weight on certain obstacles. If I were to do the build all over, the thought of running spareless would be a very real possibility.
On another note, how was pritchett? My goal for next year is to be more suited for it