Here's something I've been doing to direct the caulk where I need it... I buy my neck wire in the form of 10 GA copper wire. I go to home depot and buy it and cut to size. I buy the 3 wire, so I get 4 strands per length once I remove the insulation off the red white and black wires. This helps alot when you do what I just did, and sewed the bird up forgetting to caulk the wing pockets prior lol.. Take the casing of the wire and slip it over the caulk tube and electrical tape it on good. Cut a slot and direct the tube where needed. Works like a charm. I use this all the time to get in where I need with caulk.