I have an existing 601XL stabilizer skeleton however I am starting a 650 project and just finished the rudder. I also have an existing 601 XL completed elevator. First question is can I use the new 650 skin for the existing 601XL stabilizer skeleton? Or can I complete the 601XL stabilizer skeleton with a new 601XL skin and use both the 601XL elevator and stabilizer along with the new 650 rudder for my new 650 project? Thanks.