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Okay, I'll let you know when I get to printing those parts. Currently I did try to print one valve cylinder standing up and was close to finish printing it before it fell over. Before it fell over, the X shaped buttons did get printed but ended up as a big giant blog of melted plastic. I'll have to reprint it and try again.
I'm using a Replicator 1 and it seems to show the tops of the valve cylinders fine so far and for the one I printed, it did attempt to print the top as well. I haven't tried slicing it with other slicers, but maybe it's a problem in the other slicing programs.