d6f7415d_200G_and_needed_modifications___What_it_s_good_for_
[Feature] CRT size [ECP] 5.5" [Ampro] 9" [What it's good for.] 
Larger tubes mean better focus and more light, 5.5 is the smallest ever made, 9 is the largest except for very rare barco 912 machines.
The Ampro Esprit 4200G and needed modifications.
What it's good for.