I got my appointment with Costco hearing in a couple of weeks. I know my hearing is bad in the 105 level at 4000MHZ and I after watching tons of Brians videos I am at a crossroads between the 9040 and the Jabras. Is the Costco warranty a no questions asked policy? I mean could I try out the Jabras for 3-4 months then go to the hearlink model? If I really don't like the hearlink can I go back to the Jabras? Does the 6 month clock restart at the each hearing aid tried or when I make the first purchase. Thanks