After a little research...I'm always learning sompin' There were 2 issues of the 1110. The early version ('49) did not have the grounding spring on the drawbar. The later version (51' 52') Did have the ground strap. So I guess the spring is correct as issued. So the rear wheels are going to be 'floppy'. If this is derailing too often, like I said in my earlier post, that truck can be replaced with an improved version.
BTW: that side rod in the picture doesn't look correct. Shouldn't have the bend in it.