Okay here I am! Go get your hair dryer and warm that sucker up after it has sat out in the sun for a few hours. Get the mechanicals warmed up good and oil anywhere metal touches metal and it should free itself up. Run it in real good to make sure the oil is dispersed in the machine and you should be good to go. The sticky reverse button is an easy fix just look inside of the machine and see what all the linkage does and runs to. It might just need some oil or a little adjusting but nothing more than that hopefully.
Billy