Tractor and Limber and Gun

I always like to keep a package of eye pins.

 Get them at the jewelry department of Michaels and similar shops.
 

 I put one on the drawbar of the limber.

 

And one at the rear center of the limber.
 

 It makes for a nice late 1800's early 20th Century artillery piece with towing tractor.

 These tractors were used for decades in many different designs.

 They were slow but very powerful.