Experts,
I am having real difficulty getting a water tight seal on a replacement electric aerial I put into my 900 classic, I can't seem to get the angle of the mast right in order to not leave a gap between the seal that sits on the outside of the car. Stupidly I didn't pay much attention when I removed the old one, so now am unsure if I have even got it the right way round, and can't see how/where the metal flanges bolted to the base of the aerial motor actually fit inside the car - didn't really want to start drill new holes into the frame as I'm sure it should just fit in. The replacement aerial and the old one are exactly the same, so I definately have the right one. A picture of one fitted correctly would really help me out please, if anyone can advise?

Many thanks