Didn't want to post anything until I was sure the dang thing would even work, so the teaser pics above. Heres the meat and potatoes cooking away:
Chassis of basswood, pilot wheels from Bachmann Bug Maulers
Wheel articulation, this WILL run on the 21" pizza!
This will be a non-powered pusher engine, with the motor in a trailing car pushing it around the pizza. this set-up allows me to build interesting engines that are not powere-able using conventional sources, more to come