Jonathan years back we had a zuni which we extebsively modified. The zuni had a large slightly bulbous one piece canapy and something if a turtledeck in the fuselage begind the cockpit. We cut down the canapy and reprodiled the fuselage to attempt to get some uniform flow over the fuss top between the wings. In flight it made a noticable improvement and when we tuffed the area it showed good attachment.
Dan