Thought folks might be interested in seeing the 3D printed 15mm AW Ogre Traveller, available as an STL on their site. I had this printed by Proteus 3D Modelling, since if you're like me don't have the room for a 3D printer just yet but want to get into 3D prints outsourcing is the way to go. Furthermore the chassis is a single piece, only the wheels and turrets are separate and as such only certain printers can accommodate its size.
This Vic would be a pretty solid choice as an APC for 28mm. Although advertised as 15mm only (at 28mm I think it'd be around 32cms long from what Proteus mentioned) a Primaris Space Marine has his head just clearing the rim of the wheels, so most average 28mm figures would stand as tall as the wheel. There is also a single large door at the rear measuring about 25mm in height.
If folks would like to see more pics with 28mm figs I can sort something out. Eventually when I figure how the hell I'm going to paint this it'll end up on the 15mm thread.