Perhaps their aerodynamisists are not up to scratch Dave, seeing as they went down that road to no avail. Perhaps the Ppruners offering up their advice should have been offered a contract, or they could get together themselves, form a company like Raisbeck, solve the problem, and make a fortune modifying aircraft, or as Raisbeck did, have the mods come as standard fit off the production line as with Beechcraft for one. The rear strakes on the Lear etc are to solve a completely different issue to the MAX.