Something just occurred to me as worth a mention to you, Jim.
I think some seriously great luggage (and easily removable - a minute at most) for your bike would be the Great Basin bag by Giant Loop.
You may have seen the thread about it in Vendors on adv, or
this review.
You might need a little extra stand-off for your pipe, and not sure how you'd work it on a two-up ride. And it is $400. Oy.
But the White/Black version (see the adv thread) would look oh-so-suave on your Scram!
Am definitely ordering one (Black and White) for my new black Bonnie SE, and possibly for use on my Yammie WR250, too, although it might prove too big for that bike.