-
The other camera types seem to mount at the front of the helmet so in most cases you will have wind deflection off of the front of your bike or wind shield.
As you mentioned the critical part of mounting is the preparation of the area you wish to mount the H5 in most cases on the one side of your helmet yes you will have some wind deflection up to a certain point, but as mentioned if it is extremely hot weather the glue plate possibly could give while riding.
A better option would be a U type of bracket with one side slid up fitting between the helmet and helmet liner, the other side having the same mounting point as what is currently glued for the H5, the only downside I can see different helmet sizes and where you want the camera, the plus side is the fact that the camera is secure no matter what the weather condition and would be easy to move from one helmet to another when you replace your helmet.