I only once used the Velcrostrip. Then the glue was all over the place and I
had a hard time getting it removed.

Then I got hold of a large paperclamp. I use that to mount the Garmin III
using the bracket eactly on the space advised in the owner's manual, under
the compass. The clamp sticks out a bit, but that's not a problem for me.

I'm used to sit at a high position in the chair (due to the fact that I
always use a parachute on which I sit during paradropping).
Therefore the GPS is never blocking my view.

Ed