In the dim and distant past, I recall an incident where a well known carrier had a 747 classic depart from NRT to LGW, fully laden, and had a hydraulic fault that caused some of the spoilers deployed during TO. This wasn't picked up on the SPI but was noticed by the crew once airborne due to the 'vibration' and sluggish climb. The fault was rectified by isolating the hydraulics to the associated spoilers on the overhead panel, you know the guarded switches we never touch! and the flight continued to destination without further ado. Says a lot for Boeing - it will fly!!
My point is, will a small amount of spoiler deflection really make much of a difference? Just my opinion!
