Lovely work, a delight to view.
You are a man who likes adding detail as am I.
I always include a tow pin and pintle with chain with my tanks, BIRGER has done a tutorial on this, and you will find it if you use the search box Just type "TOW BAR",
The heading is "Replacing Missing Heng Long Tow Bar".
Easy to make and it transforms the back of a Tank.

shaun