Question About Carson Bodies

[AirBoston 0]

Does the quality of Carson's shells vary a lot?

About a year ago, I bought almost 30 of their Porsche 914 shells. These were solid, clear and fairly decent quality if not totally accurate renditions of the real car. A few months ago I bought about the same quantity. This time, the plastic was much thinner, the mold lines were hard to see and the corners weren't as tight. All in all this last batch was pretty poor. I'm working on painting several from the old batch and several from the new and there is a night and day difference. Any thoughts?