I've been riding my '92 without lowers for about 2 years now...I like the semi-naked look, but then I like the full-faring look also...if you're going to leave them off, consider moving the radiator overflow tank up behind the battery box like I and many others here have done...looks a lot more streamlined without that plastic bulge at the bottom of the frame tubes...can't remember which bike you have to look for to get the new overflow bottle from, but I can go out and snap a pic for you if you'd like? Got mine off Ebay for (I think) $8...after the switch you do need to pop the seat to check your coolant level, but that's just a key-turn away...
That case mount may just be the strongest part of your entire machine...well done!