Gp-4.5

[JazzDad]

About 1/2 the size of a GP-9. In other words, a Tooter.

 

[Rico]

Must be a slug... no fuel tank?
Well you just know Greg is going to build one now!

 

[diburning]

Too bad it already exists!

http://www.nslocos.com/nsgp4.5.html

 

[tooter]

This old Roundhouse boxcab is pretty close...