I understand completely, the changes are ever so slight at the lower end. The differences become much more noticeable as 145 becomes 152 and 152 becomes 160. Somewhere along the way one weight disappeared down the rabbit hole. Taking this year's Castle team as an example, with the state champ Welch brothers at 152 and 160. Assuming they aren't happy to bump up to 160 and 170(!) and stay put, that means that somewhere in between 135, 140 and 145 there are going to be some vicious challenge matches to hold on to a varsity spot. #*@&!! Then, if Castle's 189 bumped up to 195 they'd have to find another decent kid to fill the brand new spot at 182, or if their 189 dropped to 182, they'd have to find somebody for the new 195.
I'm not sure the bell curve concept works out so great for smaller schools - they would have problems at the top end of this curve.