Now that is cool!
I have only heard part of the radio version of the HHGTTG, on the radio on WBAI years and years ago in the middle of the night, but it included the initial part of the series, and I remember the Vogons with fondness. The model really does capture the way the ships, and the Vogons themselves, are described. And it looks very English-sci-fi, so that's a plus too.
Good luck with the kit!