Man, and I thought I did good by getting an Anakin ROTS MIB for $86.95! :o
-Joclad
I thought I would post a reply to this old post. As some of you know, I ended up selling that Anakin later on, but I've scored a mint Anakin ROTS for $65 shipped on Rebel Scum forums. ;D [/Off topic]
Back on topic, I believe someone said (Yoda I think..or was it Equinox? :P) that the diameter of the MPP flash was 1.5 inches and the Vader ESB FX was 1.525 inches so the difference is so small that unless you measure it, you will never notice it. ;)
-Joclad