I used a stack of valve nuts to space out the BB mounting on my big GB guards.
Also, you may find you need a second stay on the rear. I found my 60mm guards flapped around a little over bumps on my RoadRat which has a similar compact geometry to you Vagabond, it's a long way to the next support!
I think I need bridge mount and a large spacer in at the bb to get this looking right......