I have a Sherlock models 727 It was made back in the 70s and its finished I just need to power it and install my radio servo's, it says a 60 or 90 should fly it. Has anybody had or have experience with this model? I am not sure what engine to put on it and if it has any bad downfall's to the model. Or has anyone seen one fly or flown one and what to look out for when flying it? any suggestions would be greatly appreciated thanks.............