The vacuum line is just laid between the two pieces of plastic tarp.
Tape the plastic tube and rope to the tarp.
Then apply some latex caulk over the plastic line and close the bag.
For the time being those that want to see how to make wing tips, install ailerons, etc., should look at the Pit Bull construction thread. It is also in R/C Universe.
http://www.rcuniverse.com/forum/m_8119002/tm.htm