I didn't know CA would melt a Robart hinge until I found out directly from the Robart website. The hinges that come with the WH hardware kit are not the real deal and don't seem to be as nice as Robarts, but the name of the game is to keep the overall cost down without sacrificing necessary quality. I've read where folks have broken hinges (Robart or copies I don't know), and they replace them as needed. As short as these flights are, and as many hinges as there are in each control surface, if I do a good pre and post flight, then I'm betting on only having one fail at a time (if they ever do).
I leared my lesson on a .60 glow Edge 540 this year when I rebuilt it after an engine-failure (stale nitro) and crashed it the very next flight on a high-speed run, without sealed gaps, on a single plastic-geared elevator servo. You can guess what happened when one half of the elevator had a CA hinge pull out and flutter the surface.