I see you have a solution already but if you are interested in trying a Laminar Lip I have one that's gathering dust in the basement. I tried it as it came with the bike but couldn't tell any significant difference. I am pretty sure I have extra Velcro pads too. I'm in Geauga county so not close to Westerville but not real far either.(about 2hrs.)
My Madstad is arriving today and I hope that's the last shield I ever buy. I have tried stock, stock with Laminar Lip, stock with flip cut off, Targa 21", Rifle 19", 17" and currently 14". I like the rifle the best so far but still not crazy about the backpressure to turbulence ratio. I have been able to get rid of one or the other but not both.
Mike G