I don't think an extra .005 would matter in the bridge or nut slots Jazzy. Remember, the string gauge is a diameter, so only a fraction of that clearance is needed around the string. Going from a .045 to .050 should be fine. Might get some binding if you were to try a .055. By then you're getting into light gauge D strings. It might still work, but feel odd tension-wise with your other strings though.
Give it a try with a 50 G... might be just what you need.