aircraft are gonna be tied to a set rate.....we just cant make visual spot treatment adjustments going thru the field at 140+ mph.....now u may find a guy willing to go back and hit the worst spots again but it's gonna take $ to cover the work......and it's very hard too make that judgement call on where to apply on someone elses crop...i do know of an operator that might let u sit on his lap and run the handle if you are into that sort of thing....;)