I have a mounting question.  I put the curved mount on my Ion- cleaned the spot I wanted and stuck it on there.  I  could not find a placement where all four corners of the mount were flush with the helmet.  So, I think about 75% of the mount is on there with the four corners having a bit of space between the adhesive and the surface- although not much.  
  Is this OK?  The thing is on there tight but I don't want it falling off in freefall.
  Steve