Good tip Klippie, though I think the real problem is the bright lights I have them under here...those are extremely dark glass lens...which show nothing under normal lighting.
Here is how I modify the modules to accomodate for the bulging lens and the short, original contact area:
1. Pull contacts off a dead module, cut the contacts in half at the top loop(where they are bent over on most brands).
2.(Picture 1)Slip the contact into the pocket where the factory rubber contact(B) is, right over the rubber - do this from the display side, slipping it in with the cut end last and it's curved end away from the button area.
3.Dab a little little silver based epoxy onto the rubber contact before sliding together and under the cut end to ensure good contact and to lock the contact piece down - although, the width of most Hughes modules contact material fits very snuggly into the Commodor contact pocket. A pointed object will help you get it tucked neatly in(A).
4 (Picture 2)Slip a thin, hard plastic ring below the buttons in the case, to lift these fairly thin modules away from the inner face of the case - and to make room for the bulging magnifiers. Since the contacts now extend to the front face of the module, whatever distance this ring is below the buttons, is the amount of contact area available for the button to touch.... 8) Voila!
Pictures below.