I have a Shad 45 liter (flat black) mounted to mt DT300. Had the shop mount it for me, as I couldn't seem to figure out how to mount the support bars that came with mounting kit. Shop mounted it WITHOUT support bars ( they couldn't figure them out, either) and it looks good/has more weight support (mounted directly to frame under pillion handles) & has backrest on case.
I,also, have a GIVI tunnel bag that has a map pocket on top ( used to put GPS in there until I found a waterproof handlebar mount) and I get a lot of questions, now, as to whether it is a "regular" motorcycle ( no longer a true 'step-through like it was ) .
Guy stopped to talk to me the other day and is thinking he wants to get rid of his Harley Sporster and get a DT300!