Weaver finally got it somewhat correct by the end. The last series (LD) cars were probably the best of Weavers production other than the undersize graphics.
Prior to that, too many changes with weights, thin floors and odd ball + or - screws thru the years. Shells by todays standards still look ok but are now a bit obsolete. Lacking details now seen on newer competitors stuff.
New designs/ improvement's have been incorporated into MTH & Lionel O surpassing even Atlas.
I own quite a few Weaver cars and love them all. All contain die-cast trucks and couplers except for a couple of cabooses and two 57' reefers. Good O cars for their day I guess.