On Sunday I rode Moto SAG support for an annual bicycle ride around Lake Tahoe. There were well over 1000 bicyclists on the ride. I was on the bike for about 12 hours--6 am to 6 pm. It rained from 0630 until 1230. My Gore-Tex jacket kept me fairly dry. I had an opportunity to use my QuadLock anti-vibration mount that I bought to hold my HAM (KG7 IDG) radio--see message #3 of this thread--under rather difficult circumstances, it did the job with no drama. I had to smooth the back of the radio case, which is the removable battery container, with sandpaper in order to get a good surface for the stick-on mating piece for the QuadLock.
A few weeks ago I was able to buy a BlueTooth device that connected the radio with my N-Com unit in the Nolan helmet. This was really slick until the rain got into the device and caused the radio to go into an unwanted transmit mode. Now that all is dry, everything seems to work correctly again. I'll get another chance on June 25; I am riding support for a 200 mile bicycle ride in the Sierra.
The point of this is the QuadLock mount works exactly as I hoped it would. I recommend to anyone thinking of getting this holder, go for it, it is a good product.