I fished my Sirius antenna up under my canvas and out onto my luggage rack, where I held it down with 3M double sided adhesive foam.  The wire exits under the pop top seal, but no water has found its way in as of yet.  And, the radio picks up very well.  I recently drove from OKC to Santa Fe and back, mostly in rain and cloudy weather, and never once lost signal.

Warren
88 Westy "Billy Bones"
87 GL "Long John"

P.s.  Ole Billy Bones got himself a new paint job yesterday.  Slick as glass!  I'll pick him up today.  Hope all the masking was good.  I hate overspray.