Nice info there...
Pardon me as its been a long time since I last watch Trigun. The only thing I can remember are Vash's goofy antics and his "LOVE and PEACE!!" motto. I even have to look up the names of the characters so that I can use them in this post.
Come to think of it, I vaguely remember Milly and Meryl riding these Thomas... am I right? Michael Stampede obviously pays homage to Vash the Stampede and Chapel the Evergreen is the name of a villian in Trigun.
You enlightened me... Thanks...