New Wilson Grain Trailer

I have been reading a lot on this forum. Some really good stuff on here. But I have a question for any bulker b-train guys out there.

We recently purchased a new Wilson Tridem grian trailer. Wilson have moved the hopper cranks to the outside of the hoppers and have a chain drive system to open them now. The idea is good because this allows more room for unloading into an auger.
My concerns with this sysem is how well the chain is going to stand up to road dust/stones, and ice/highway salt in the winter time.
Has anyone been running these trailers long enough to see how well they work compaired to the old direct drive type?