I mounted an ACS di-pole in the VS yesterday and hooked up a handheld to make sure it had a chance of working. (Although others have said the surrounding metal framework won't bother it . . . . . well, you might say seeing is believing.) It picked up Dulles/Potomac approach control!! The airport is 34 miles away and approach is located about 15 miles away. I'm in the hills and there are lots of them between me and approach - not to mention the aluminum garage door. Bottom line - I'm pleased and impressed. The only downside with putting it in the VS - the bottom end will have to be moved (i.e., bent a bit) to get the HS in. I moved it thru what I think will be the required range and it was no big deal - no permanent deformation at all.