Good to see you back around. ^.^
Very nice looking ship, that, yeah. Just for note, the current de facto standard is 120 facings nowadays if/when you do sprite it up. Not sure if that was the case when you were last around.
As for scale, the relevant post by George is
here. Or for easier reference:
size(pixels) = 5 * size(meters)^(0.68)
size(meters) = [size(pixels)/5]^(1/0.68)