Hi all - I recently received a flyer in the mail concerning dual aft body strakes and how they are supposed to increase true airspeed, increase rate of climb, decrease stall speed, lower fuel costs, and a few other items.  My question to the community is:  Are there any C414 or specifically C414A owners on this forum that have installed dual aft body strakes?  Did you see any performance improvements?  I currently own a 1982 C414A with RAM VII upgrade and was wondering if these strakes would improve the performance of my aircraft.  Thanks in advance for any and all information.