I am almost there, guys. The ptfe tube quick connect couplers came today. The titan aer comes with a stupid plastic arm that has a u shaped hole on top so I can not screw anything into it.. I tried to thread the fitting into it anyways but with no success and because the hole is at the top it would leave a large gap between the end of the coupler and the hobbed gear. Here is my all metal arm and I had to order the couplers in a 10 pack. And all I have to do now is find a m5x0.8 tap so I can put some threads in this all metal arm and I am back in business. I just have to locate this tap.