I have a pair of Quest's and find them supremely comfortable. However a few days ago I decided to take out my Sorbothane inserts and use my Superfeet inserts. A mistake!
Within a few hours, I had a blister on the inside of my right foot arch just on the edge of my Superfeets, a top edge which the Sorbothane doesn't have. I temporarily solved it by fitting a bit of folded plastic under the inside edge of the Superfeets, it just tilted my foot enough to create a tiny bit of space between my foot and the insert. I hope the following offers an alternative idea which might be useful to experiment with.
I discovered a few years ago, by trial and error and by using a sloping stretch of tarmac road near to me, that as I walked my left foot on impact tilts to the left and my right foot does the same but less so. This problem shows itself as increased sole wear along the whole outside edges of my boots.
I solved my problem by cutting, three, if I remember correctly, old trainer inserts longways and placed the best one under my Sorbothan inserts. In a single moment, my problem was solved. I did plan to go to a running shop and get my walking style analysed by computer/tread mill but I never got around to it. My boots now wear evenly because of this simple trick and I also believe that I now walk more comfortably. My problem is not noticeable when I buy new boots, it shows itself sometime later as my boots start to wear unevenly.
My recent walk problem was not caused by the Superfeets, it was because I forgot to put my half trainer insert in under the Superfeets before I set off.