Off of the top of my head a simple back plunger and a front screen on the scoop would have allowed control of sifted samples. How about coating the scoop with Teflon? They anticipated all these procedures (pictures, vibration, etc.) so you can't tell me no one thought about issues of sampling on this mission. If some armchair engineer like me can think of these things off the top of my head, I do question the design. And when a program is obviously mismanaged in the beginning, one should be extremely skeptical about using artifacts from it to build another mission. Given these facts, I don't think due diligence was taken on the reused design.