VTL Ultimate Tube Replacement

I want to replace the tubes in the linestage but can't get the one on the lower right side out even after removing the one above it. I can't get a grip, nor see the position of the pins. Is there a trick/method for doing this in this unit?

Thank you
I remember reading that VTL built a special gig to be able to service that tube.I would call VTL and seek there advice on how to proceed as they have a reputation for great service(I had VTL 100s for over a decade).
I believe the Ultimate was designed by the same engineer who gave us the Chevy Vega.
You had to remove the engine to change the spark plugs...