I purchased these from a seller on Aliexpress, not Ebay. I'm sure they all came from the same factory.
Anyway, these are in a word horrible. The distance from the top of the truck to the top of the coupler box is larger than usual. A MTL washer is needed to allow the truck to pivot smoothly and not scrape the underside of a car. The mounting hole in is large enough to allow a 2-56 flat head screw to pull through. The couplers don't operate smoothly and don't sit flat which causes them to change height when stress is put on them. (Like pulling a train!)
On to the worst part: there is a molding mark on the tread of each wheel. It's not flash or a parting line, it's almost like where a sprue was attached.
On the bright side, they take standard .540 axles.
I'll add 8×10 Color Glossy Pictures With Circles And Arrows And A Paragraph On The Back Of Each One tomorrow morning.