this is a long step so bear with me. first well preapare the engines. To waterproof tthe inside of the engines i taped over the part wee air is taken in. this reduces speed but it will easily short circut otherwise. Dont get me wrong it goes very very fast even with the reduce and it will go to fast for the frail(but strong) base to handle if it crashes if you dont reduce it anyways. see the tape across the engines? do that for both. next were going to apply the rudders. rememebr those botom pieces get them and put them into the holes they should not fit you should have to force them this keeps them in place. now once youve done that get your apoxy gelglue. and apply the mixture and stir it together. apply it onto the rudders so theyl stay firmly in place. look at the pic for help. apply the glue from the top not the bottom. Now your done with this step!