Thank You Walter and Ifly.....I have owned and flown the same J3 Cub since 1969 and this is the best thing to come along since the gas engine.....no more huge maps to fly out the window..no more wondering where the next airport is,I could go on and on and for low and slow flyers this is the ticket.....Thanks again for making it affordable...and very user friendly.....J.Herbster