When I was picking up my '03 954 in early August of '04 I noted a decent sized tank bag held by magnets & with mine being quite old & a strap-on it was not the easy to swamp from one bike to the other. With three bikes it would be a chore.
When trying it out & buying it the chap in charge of parts & accessories point out it was next to nil in obtaining one for the 1000 with its f/glass top. Something I had given little thought of. Since I was not really sold on the 1000 in its first appearance.
Remember all the others on the road are crazy & out to kill you.