Ironside , have you ever used the aero calculator tool at the top of the page to work out your CdA ?
Aerodynamic & rolling resistance, power & MPG calculator - EcoModder.com . I'd be very interested in the area and what you think the drag figure would be ? .4 ?
I have to admit that your job thus far is the most achievable I've seen here. That dustbin fairing would be the biggest task but it's something I'm going to have to build no matter how I proceed. A CT 110 is available for about $1000 ... that's fairly cheap for an roadworthy bike of any variety here.