In practice I’ve had them let it go through if you’re “close”. Specifically have had this courtesy extended most of the time with skis - large bag with 2 sets, boots, gear, etc.

No guarantee you won’t run up against a stickler, but I’ve had good luck with it. A smile goes a long way.

Close means 51-55lbs, not 70. Make it easy for them to look the other way.

Worst case you have to spend a couple bucks.