I don't know! If six wraps takes all the stretch out of the elastic then I could see severe strain / pressure on the cross member. Especially during a hard landing. There is nothing left to give.

I would take this up with Debra and John.

If five wraps is sufficient for the rated gross weight and you are constantly over gross then consideration should be for a larger / thicker bungee and not an extra wrap with the existing size.

Eric.