That is a good idea to use a stronger magnet to open the hatch secured by one of the rare earth magnets.

I usually put a small "fingernail catch" on the edge of the hatch so that I can pop it open. I can get away with that now since the HLGs and sailplanes aren't scale.

If the rare earth magnet holds too strong, you can break it (like a pill) or put a layer of scotch tape between it and the metal.

--Bill