Hi Guys. I have read most if not all of the discussion and have a few questions that I hope some one can help with. I just bought the CMPro Cessna 182 50 kit and am debating on weather to bolt on a OS 56FS-a engine or the OS 81FS-a. There is only a 3 oz differance and a.3 differance in output. Will the OS 81FS-a fit inside the cowl without cutting also would the OS 56FS-a have the power for this plane. I would like to go with the 81FS-a because it has almost 1/3 more power with only 3 oz's more weight. Now I would like to put in the Nav and Landing lights. I don't want the Nav lights to flash together but opposit each other with a programable times for flashes. Any names will help. I am also going with the Robart hinges and steering yoke. Any other suggestions would help. Thanks. DSTIEBS.