Another Question to VANS support

So this morning after I had finished the cutouts for the step kit, I have some heartburn about what I have done.  The cut is an arch in both sides of the F-623 Corner Ribs on both sides of the baggage compartment floor. The plans call out a cut which covers the entire height of the side wall. After doing this, I realize that this cut takes away 100% of the rigidity of the part lengthwise. Questioning this I sent an email to VAN's tech support to confirm that this is what they intended.

Here are the plans calling out the cut.



 And here is the cut I made.



We will see what they come back with. Might be buying a new part.